staging/rtl8712/osdep_service.h Fix line over 80 characters.

Fix checkpatch.pl issues with
line over 80 characters in osdep_service.h

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>