usb: typec: ucsi: ccg: fix missing unlock on error in ccg_cmd_write_flash_row()

Add the missing unlock before return from function ccg_cmd_write_flash_row()
in the error handling case.

Fixes: 5c9ae5a8 ("usb: typec: ucsi: ccg: add firmware flashing support")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/ucsi/ucsi_ccg.c

@@ -631,6 +631,7 @@ ccg_cmd_write_flash_row(struct ucsi_ccg *uc, u16 row,
 	ret = i2c_master_send(client, buf, CCG4_ROW_SIZE + 2);
 	if (ret != CCG4_ROW_SIZE + 2) {
 		dev_err(uc->dev, "REG_FLASH_RW_MEM write fail %d\n", ret);
+		mutex_unlock(&uc->lock);
 		return ret < 0 ? ret : -EIO;
 	}