msm: display: Add proper flags for secure/non-secure writeback buffers

For MDP writeback buffer allocations, use appropriate heap id flags
for secure and non-secure sessions

Change-Id: I05e897d5d90ab03b17ccddbda764f39b963192ef
Signed-off-by: Ravishangar Kalyanam <rkalya@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-8960-display.c b/arch/arm/mach-msm/board-8960-display.c
index 61bf9fc..2a29ad0 100644
--- a/arch/arm/mach-msm/board-8960-display.c
+++ b/arch/arm/mach-msm/board-8960-display.c
@@ -704,7 +704,7 @@
 #endif
 	.mdp_rev = MDP_REV_42,
 #ifdef CONFIG_MSM_MULTIMEDIA_USE_ION
-	.mem_hid = ION_CP_MM_HEAP_ID,
+	.mem_hid = BIT(ION_CP_MM_HEAP_ID),
 #else
 	.mem_hid = MEMTYPE_EBI1,
 #endif