platform: msm8952: use write back cache for kernel load memory

It will be much more performance enhanced when use write back
cache policy for kernel load memory.

Change-Id: I7935a696173e4a15798718c5ed012edf9ce71930
diff --git a/platform/msm8952/platform.c b/platform/msm8952/platform.c
index af4f279..ec5a1d8 100644
--- a/platform/msm8952/platform.c
+++ b/platform/msm8952/platform.c
@@ -117,7 +117,7 @@
 	sections = 90;
 	while(sections--)
 	{
-		arm_mmu_map_section(ddr_start + sections * MB, ddr_start + sections* MB, COMMON_MEMORY);
+		arm_mmu_map_section(ddr_start + sections * MB, ddr_start + sections* MB, SCRATCH_MEMORY);
 	}