ARM: at91: remove at91sam9rl legacy board support

Remove legacy support for at91sam9rl boards.
This include board files removal plus all legacy code for non DT boards
support.
Use the Device Tree for running this board with newer kernels.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: Add sentence about DT]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/Kconfig.non_dt

@@ -33,12 +33,6 @@ config ARCH_AT91SAM9263
 	select AT91_USE_OLD_CLK
 	select OLD_IRQ_AT91
 
-config ARCH_AT91SAM9RL
-	bool "AT91SAM9RL"
-	select SOC_AT91SAM9RL
-	select AT91_USE_OLD_CLK
-	select OLD_IRQ_AT91
-
 endchoice
 
 config ARCH_AT91SAM9G20
@@ -281,19 +275,6 @@ endif
 
 # ----------------------------------------------------------
 
-if ARCH_AT91SAM9RL
-
-comment "AT91SAM9RL Board Type"
-
-config MACH_AT91SAM9RLEK
-	bool "Atmel AT91SAM9RL-EK Evaluation Kit"
-	help
-	  Select this if you are using Atmel's AT91SAM9RL-EK Evaluation Kit.
-
-endif
-
-# ----------------------------------------------------------
-
 comment "AT91 Board Options"
 
 config MTD_AT91_DATAFLASH_CARD

arch/arm/mach-at91/Makefile

@@ -24,7 +24,6 @@ obj-$(CONFIG_ARCH_AT91RM9200)	+= at91rm9200_devices.o
 obj-$(CONFIG_ARCH_AT91SAM9260)	+= at91sam9260_devices.o
 obj-$(CONFIG_ARCH_AT91SAM9261)	+= at91sam9261_devices.o
 obj-$(CONFIG_ARCH_AT91SAM9263)	+= at91sam9263_devices.o
-obj-$(CONFIG_ARCH_AT91SAM9RL)	+= at91sam9rl_devices.o
 
 # AT91RM9200 board-specific support
 obj-$(CONFIG_MACH_ONEARM)	+= board-1arm.o
@@ -56,9 +55,6 @@ obj-$(CONFIG_MACH_AT91SAM9G10EK) += board-sam9261ek.o
 # AT91SAM9263 board-specific support
 obj-$(CONFIG_MACH_AT91SAM9263EK) += board-sam9263ek.o
 
-# AT91SAM9RL board-specific support
-obj-$(CONFIG_MACH_AT91SAM9RLEK)	+= board-sam9rlek.o
-
 # AT91SAM9G20 board-specific support
 obj-$(CONFIG_MACH_AT91SAM9G20EK) += board-sam9g20ek.o
 obj-$(CONFIG_MACH_CPU9G20)	+= board-cpu9krea.o