Revert "ARM: move VMALLOC_END down temporarily for shmobile"

This reverts commit 0af362f as shmobile
is not using a non-standard memory layout anymore.

Signed-off-by: Nicolas Pitre <nico@linaro.org>

arch/arm/include/asm/pgtable.h

@@ -37,13 +37,6 @@
 #define VMALLOC_START		(((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
 #define VMALLOC_END		0xff000000UL
 
-/* This is a temporary hack until shmobile's DMA area size is sorted out */
-#ifdef CONFIG_ARCH_SHMOBILE
-#warning "SH-Mobile's consistent DMA size conflicts with VMALLOC_END by 144MB"
-#undef VMALLOC_END
-#define VMALLOC_END		0xF6000000UL
-#endif
-
 #define LIBRARY_TEXT_START	0x0c000000
 
 #ifndef __ASSEMBLY__