staging: rtl8723bs: add spaces around operator in include/rtw_pwrctrl.h

fix post-commit hook checkpatch warning:

add a space around that '*'

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/d0695bf94766ee68aba70daaa1cdefff64c38b62.1616854134.git.fabioaiuto83@gmail.com


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