staging: rtl8723bs: fix typo in a comment

The double `for' in the comment in line 2203 is repeated. Remove one
of them from the comment.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Link: https://lore.kernel.org/r/20211211091632.264035-1-wangborong@cdjrlc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>