arm: mm: Remove 5MB offset for vmalloc

commit f973fab6921 added a 5MB highmem zone to fix
a page fault error due to generic 3.0 bug.
Remove this extra 5MB offset because we now have a 256MB
highmem zone.

Change-Id: I430fed88baccd44d438c21607f87219206f1f20a
Signed-off-by: Jack Cheung <jackc@codeaurora.org>
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 9beef12..84a7e5c 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -796,14 +796,9 @@
 	int i, j, highmem = 0;
 
 #if (defined CONFIG_HIGHMEM) && (defined CONFIG_FIX_MOVABLE_ZONE)
-
-/* For now, we must ensure that a small highmem zone exists
- * after most of it is transformed into the movable zone.
- */
-#define MIN_HIGHMEM_SIZE (5 * SECTION_SIZE)
 	void *v_movable_start;
 
-	v_movable_start = __va(movable_reserved_start) - MIN_HIGHMEM_SIZE;
+	v_movable_start = __va(movable_reserved_start);
 
 	if (vmalloc_min > v_movable_start)
 		vmalloc_min = v_movable_start;