Staging: mt29f_spinand: Remove redundant cast on 'retval'

Remove the unneeded cast to 'int' since 'retval' is originally declared as
'int'.
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt29f_spinand/mt29f_spinand.c

@@ -595,7 +595,7 @@ static int spinand_erase_block(struct spi_device *spi_nand, u16 block_id)
 		if (retval < 0) {
 			dev_err(&spi_nand->dev,
 					"error %d reading status register\n",
-					(int)retval);
+					retval);
 			return retval;
 		}