mmc: meson-gx: implement card_busy callback

Implement the card_busy callback to be able to verify that the
card is done dealing with voltage switch, when the support is
added later on.

Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jerome Brunet 2017-08-28 16:29:11 +02:00 • committed by Ulf Hansson
commit 186cd8b7f5