platform: msm_shared: Update TZ App mem region size on msm8996

On top of the original 14M memory used for TZ apps, an
additional 20M memory for Stargate apps is added into
the latest msm8996 memory map, so update TZ app region
size to be 34M, i.e. 0x2200000.

Change-Id: Icf29bc605faa8b7919537fcbbb3fb9d17732ed25
diff --git a/platform/msm8996/include/platform/iomap.h b/platform/msm8996/include/platform/iomap.h
index e112788..5d47a6a 100644
--- a/platform/msm8996/include/platform/iomap.h
+++ b/platform/msm8996/include/platform/iomap.h
@@ -161,7 +161,7 @@
 
 /* QSEECOM: Secure app region notification */
 #define APP_REGION_ADDR 0x86600000
-#define APP_REGION_SIZE 0xd00000
+#define APP_REGION_SIZE 0x2200000
 
 /* DRV strength for sdcc */
 #define SDC1_HDRV_PULL_CTL           (TLMM_BASE_ADDR + 0x0012C000)