platform: msm_shared: Fix partition offset overflow in avb

The partition offset maybe is more than 32bit, so define the UINTN
as uint64_t instead of uintptr_t to fix this problem.

Change-Id: I2b61ac962abf1009de5950113eb7222e44809cfd
diff --git a/platform/msm_shared/include/verifiedboot.h b/platform/msm_shared/include/verifiedboot.h
index 9e16982..7534c14 100644
--- a/platform/msm_shared/include/verifiedboot.h
+++ b/platform/msm_shared/include/verifiedboot.h
@@ -105,7 +105,7 @@
 typedef int16_t   INT16;
 typedef int32_t   INT32;
 typedef int64_t   INT64;
-typedef uintptr_t UINTN;
+typedef uint64_t  UINTN;
 
 typedef enum {
 	VB_UNDEFINED_HASH	= 0,