Bluetooth: Silence warning in btmrvl SDIO driver

Clone checking of ret to simplify the code.

This patch silences a compiler warning:
drivers/bluetooth/btmrvl_sdio.c: In function ‘btmrvl_sdio_verify_fw_download’:
drivers/bluetooth/btmrvl_sdio.c:80: warning: ‘fws1’ may be used uninitialized in this function
drivers/bluetooth/btmrvl_sdio.c:80: note: ‘fws1’ was declared here

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Reviewed-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btmrvl_sdio.c

@@ -83,10 +83,10 @@ static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 	*dat = 0;
 
 	fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
+	if (ret)
+		return -EIO;
 
-	if (!ret)
-		fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
-
+	fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
 	if (ret)
 		return -EIO;