hwmon: (xgene-hwmon) Add free before exiting xgene_hwmon_probe

Call kfifo_free(&ctx->async_msg_fifo) before error exiting
instead of returning directly.

Signed-off-by: Peiwei Hu <jlu.hpw@foxmail.com>
Link: https://lore.kernel.org/r/tencent_C851C0324431466CBC22D60C5C6AC4A8E808@qq.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>