staging: rtl8723au: whitespace and blank line cleaning

This patch cleans whitespaces and blank lines involved with
previous two patchs in this patch set.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>