staging: ks7010: change some local variables type in ks_sdio_interrupt

Local variables 'status', 'rsize' and 'byte' are declared as
unsigned char and can be declared as u8 which is preferred.
They are being used in ks7010_sdio_readb calls which is already
expected an u8.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks7010_sdio.c

@@ -542,7 +542,7 @@ static void ks_sdio_interrupt(struct sdio_func *func)
 	int ret;
 	struct ks_sdio_card *card;
 	struct ks_wlan_private *priv;
-	unsigned char status, rsize, byte;
+	u8 status, rsize, byte;
 
 	card = sdio_get_drvdata(func);
 	priv = card->priv;