staging: rtl8723au: core: fixing "foo * bar" should be "foo *bar"

Fixed a coding style error, "foo * bar" should be "foo *bar"

Signed-off-by: Asaf Vertz <asaf.vertz@tandemg.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>