ARM: remove u300 platform

The Ericsson U300 platform was one of two ARM929 based SoC platforms for
mobile phones in ST-Ericsson after the merger of Ericsson with ST-NXP
into ST-Ericsson, the other one being the ST Nomadik.

The platform was not widely adopted in Linux based systems and was
replaced with the far superior ST-Ericsson U8500 in 2011, but Linus
Walleij kept maintaining the code for the whole time.

Linus continues to use the Nomadik machine, but decided to drop
u300 from the kernel as part of this year's spring cleaning.
Thanks for having maintained it all these years.

Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/lkml/CACRpkdbJkiHR9FSfJTH_5d_qRU1__dRXHM1TL40iqNRKbGQfrQ@mail.gmail.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -2136,7 +2136,7 @@ ARM/NEC MOBILEPRO 900/c MACHINE SUPPORT
 M:	Michael Petchkovsky <mkpetch@internode.on.net>
 S:	Maintained
 
-ARM/NOMADIK/U300/Ux500 ARCHITECTURES
+ARM/NOMADIK/Ux500 ARCHITECTURES
 M:	Linus Walleij <linus.walleij@linaro.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
@@ -2145,35 +2145,23 @@ F:	Documentation/devicetree/bindings/arm/ste-*
 F:	Documentation/devicetree/bindings/arm/ux500.yaml
 F:	Documentation/devicetree/bindings/arm/ux500/
 F:	Documentation/devicetree/bindings/i2c/i2c-nomadik.txt
-F:	Documentation/devicetree/bindings/i2c/i2c-stu300.txt
 F:	arch/arm/boot/dts/ste-*
 F:	arch/arm/mach-nomadik/
-F:	arch/arm/mach-u300/
 F:	arch/arm/mach-ux500/
 F:	drivers/clk/clk-nomadik.c
-F:	drivers/clk/clk-u300.c
 F:	drivers/clocksource/clksrc-dbx500-prcmu.c
-F:	drivers/clocksource/timer-u300.c
-F:	drivers/dma/coh901318*
 F:	drivers/dma/ste_dma40*
 F:	drivers/hwspinlock/u8500_hsem.c
 F:	drivers/i2c/busses/i2c-nomadik.c
-F:	drivers/i2c/busses/i2c-stu300.c
 F:	drivers/iio/adc/ab8500-gpadc.c
-F:	drivers/mfd/ab3100*
 F:	drivers/mfd/ab8500*
 F:	drivers/mfd/abx500*
 F:	drivers/mfd/db8500*
 F:	drivers/mfd/dbx500*
 F:	drivers/pinctrl/nomadik/
-F:	drivers/pinctrl/pinctrl-coh901*
-F:	drivers/pinctrl/pinctrl-u300.c
-F:	drivers/rtc/rtc-ab3100.c
 F:	drivers/rtc/rtc-ab8500.c
-F:	drivers/rtc/rtc-coh901331.c
 F:	drivers/rtc/rtc-pl031.c
 F:	drivers/soc/ux500/
-F:	drivers/watchdog/coh901327_wdt.c
 
 ARM/NUVOTON NPCM ARCHITECTURE
 M:	Avi Fishman <avifishman70@gmail.com>

arch/arm/Kconfig

@@ -704,8 +704,6 @@ source "arch/arm/mach-sunxi/Kconfig"
 
 source "arch/arm/mach-tegra/Kconfig"
 
-source "arch/arm/mach-u300/Kconfig"
-
 source "arch/arm/mach-uniphier/Kconfig"
 
 source "arch/arm/mach-ux500/Kconfig"

arch/arm/Kconfig.debug

@@ -1280,14 +1280,6 @@ choice
 		  Say Y here if you want kernel low-level debugging support
 		  on Tegra based platforms.
 
-	config DEBUG_U300_UART
-		bool "Kernel low-level debugging messages via U300 UART0"
-		depends on ARCH_U300
-		select DEBUG_UART_PL01X
-		help
-		  Say Y here if you want the debug print routines to direct
-		  their output to the uart port on U300 devices.
-
 	config DEBUG_UX500_UART
 		depends on ARCH_U8500
 		bool "Use Ux500 UART for low-level debug"
@@ -1650,7 +1642,6 @@ config DEBUG_UART_PHYS
 	default 0x808c0000 if DEBUG_EP93XX || ARCH_EP93XX
 	default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
 	default 0xb0090000 if DEBUG_VEXPRESS_UART0_CRX
-	default 0xc0013000 if DEBUG_U300_UART
 	default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
 	default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
 	default 0xd0000000 if DEBUG_SPEAR3XX
@@ -1804,7 +1795,6 @@ config DEBUG_UART_VIRT
 	default 0xfefb0000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1
 	default 0xfefb0800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2
 	default 0xfefb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3
-	default 0xff003000 if DEBUG_U300_UART
 	default 0xffd01000 if DEBUG_HIP01_UART
 	default DEBUG_UART_PHYS if !MMU
 	depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \

arch/arm/Makefile

@@ -214,7 +214,6 @@ machine-$(CONFIG_ARCH_STI)		+= sti
 machine-$(CONFIG_ARCH_STM32)		+= stm32
 machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
 machine-$(CONFIG_ARCH_TEGRA)		+= tegra
-machine-$(CONFIG_ARCH_U300)		+= u300
 machine-$(CONFIG_ARCH_U8500)		+= ux500
 machine-$(CONFIG_ARCH_VERSATILE)	+= versatile
 machine-$(CONFIG_ARCH_VEXPRESS)		+= vexpress

arch/arm/boot/dts/Makefile

@@ -1255,8 +1255,6 @@ dtb-$(CONFIG_ARCH_TEGRA_124_SOC) += \
 	tegra124-nyan-big.dtb \
 	tegra124-nyan-blaze.dtb \
 	tegra124-venice2.dtb
-dtb-$(CONFIG_ARCH_U300) += \
-	ste-u300.dtb
 dtb-$(CONFIG_ARCH_U8500) += \
 	ste-snowball.dtb \
 	ste-hrefprev60-stuib.dtb \