ITS: Change type of flash region size

size_t is the more logical type to use for this struct element.
On PSoC64, also change the type of the size parameter to
nvc_flash_block() for consistency and to keep the code in
driver_smpu.c typecast- and warning-free.

Change-Id: I16b3b8d543e1d7ea84353b8e601327e13cef5e3b
Signed-off-by: Chris Brand <chris.brand@cypress.com>
diff --git a/platform/ext/common/tfm_hal_ps.c b/platform/ext/common/tfm_hal_ps.c
index df88292..1f3f6e5 100644
--- a/platform/ext/common/tfm_hal_ps.c
+++ b/platform/ext/common/tfm_hal_ps.c
@@ -9,7 +9,7 @@
 #include "flash_layout.h"
 #include "tfm_hal_ps.h"
 
-__WEAK void tfm_hal_ps_fs_info(uint32_t *flash_area_addr, uint32_t *flash_area_size)
+__WEAK void tfm_hal_ps_fs_info(uint32_t *flash_area_addr, size_t *flash_area_size)
 {
     if (!flash_area_addr || !flash_area_size) {
         return;