nrf51: Remove pointer cast

Int may not be 32 bit long.

Change-Id: I420f7efeb484eb35c1d7c20e1575b0b31ed8c9ff
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3930


Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/flash/nor/nrf51.c

@@ -690,14 +690,15 @@ static int nrf51_probe(struct flash_bank *bank)
 
 		/* Note the register name is misleading,
 		 * NRF51_FICR_CODESIZE is the number of pages in flash memory, not the number of bytes! */
-		res = target_read_u32(chip->target, NRF51_FICR_CODESIZE,
-				(uint32_t *) &bank->num_sectors);
+		uint32_t num_sectors;
+		res = target_read_u32(chip->target, NRF51_FICR_CODESIZE, &num_sectors);
 		if (res != ERROR_OK) {
 			LOG_ERROR("Couldn't read code memory size");
 			return res;
 		}
 
-		bank->size = bank->num_sectors * chip->code_page_size;
+		bank->num_sectors = num_sectors;
+		bank->size = num_sectors * chip->code_page_size;
 
 		if (spec && bank->size / 1024 != spec->flash_size_kb)
 			LOG_WARNING("Chip's reported Flash capacity does not match expected one");