staging: rtl8723au: The driver only has one c2h_id_filter

Since we only have one function for this, there is no point in keeping
the HAL silliness.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>