staging: rtl8712: Align function arguments with opening paranthesis

Fixes checkpatch.pl "CHECK Alignment should match open parenthesis"
on drivers/staging/rtl8712/rtl8712_recv.c:122
Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Link: https://lore.kernel.org/r/20191008195350.20544-1-wambui.karugax@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>