ARM: realview: remove sparsemem hack

The realview-pbx platform has an elaborate way of avoiding the use of highmem
by redefining its phys_to_virt function. In practice this doesn't help all
that much, and it gets in the way of doing multiplatform builds for
realview.

This removes the feature and kills off the mach/memory.h file for realview.
We also lose the ability to do sparsemem with this patch, but that should
be put back into place for generic multiplatform configurations, to save
a little memory on PBX.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/Kconfig

@@ -239,7 +239,6 @@ config ARM_PATCH_PHYS_VIRT
 	bool "Patch physical to virtual translations at runtime" if EMBEDDED
 	default y
 	depends on !XIP_KERNEL && MMU
-	depends on !ARCH_REALVIEW || !SPARSEMEM
 	help
 	  Patch phys-to-virt and virt-to-phys translation functions at
 	  boot and module load time according to the position of the
@@ -354,7 +353,6 @@ config ARCH_REALVIEW
 	select GENERIC_CLOCKEVENTS
 	select GPIO_PL061 if GPIOLIB
 	select ICST
-	select NEED_MACH_MEMORY_H
 	select PLAT_VERSATILE
 	select PLAT_VERSATILE_SCHED_CLOCK
 	help

arch/arm/mach-realview/Kconfig

@@ -102,14 +102,13 @@ config MACH_REALVIEW_PBA8
 
 config MACH_REALVIEW_PBX
 	bool "Support RealView(R) Platform Baseboard Explore"
-	select ARCH_SPARSEMEM_ENABLE if CPU_V7 && !REALVIEW_HIGH_PHYS_OFFSET
 	select ARM_GIC
 	select HAVE_ARM_SCU if SMP
 	select HAVE_ARM_TWD if SMP
 	select HAVE_PATA_PLATFORM
 	select HAVE_SMP
 	select MIGHT_HAVE_CACHE_L2X0
-	select ZONE_DMA if SPARSEMEM
+	select ZONE_DMA
 	help
 	  Include support for the ARM(R) RealView(R) Platform Baseboard
 	  Explore.
@@ -124,6 +123,6 @@ config REALVIEW_HIGH_PHYS_OFFSET
 	  the board supports 512MB of RAM, this option allows the
 	  memory to be accessed contiguously at the high physical
 	  offset. On the PBX board, disabling this option allows 1GB of
-	  RAM to be used with SPARSEMEM.
+	  RAM to be used with HIGHMEM.
 
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