commit 56b0730157f70dc23d6caff9e7ceb8b377b96b9f upstream.

On the A80, mmc1 is available on pingroup G. Designs mostly use this
to connect to an SDIO WiFi chip.
Signed-off-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NRask Ingemann Lambertsen <rask@formelder.dk>
Reviewed-by: NJagan Teki <jagan@openedev.com>