misc: hisi_hikey_usb: delete a stray tab

This return statement is indented one tab too far.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200918143405.GF909725@mwandaSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>