zd1211rw: fix spelling mistake "firmeware" -> "firmware"

Trivial fix to spelling mistake in dev_err message.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NJulian Calaby <julian.calaby@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/zydas/zd1211rw/zd_usb.c

@@ -193,7 +193,7 @@ static int upload_code(struct usb_device *udev,
 			0, 0, p, sizeof(ret), 5000 /* ms */);
 		if (r != sizeof(ret)) {
 			dev_err(&udev->dev,
-				"control request firmeware confirmation failed."
+				"control request firmware confirmation failed."
 				" Return value %d\n", r);
 			if (r >= 0)
 				r = -ENODEV;