staging: rtl8188eu: core: Fix line over 80 characters

This patch fixes line over 80 characters warninings while
running checkpatch.pl - "WARNING: line over 80 characters"

Signed-off-by: Jagan Teki <jteki@openedev.com>
Cc: Greg Kroah-Hartman <gregkh@linux.com>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>