staging: rtl8192u: r819xU_firmware.h: fix line over 80 characters

Fixed coding style issue line "over 80 characters" detected by
checkpatch.pl in r819xU_firmware.h

Signed-off-by: Buţiu Alexandru Octavian <predator5047@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>