Staging: rtl8192u : fix space before , coding style issue in r8190_rtl8256.c

This is a patch to r8190_rtl8256.c file that fixes space before , warning found by checkpatch.pl tool

Signed-off-by: Mohammad <Jamal&lt;md.jamalmohiuddin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>