mmc: core: Add shutdown callback for SD bus_ops

For the SD .shutdown callback we re-use the SD suspend function since
it performs the relevant actions.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/core/sd.c

@@ -1170,6 +1170,7 @@ static const struct mmc_bus_ops mmc_sd_ops = {
 	.resume = NULL,
 	.power_restore = mmc_sd_power_restore,
 	.alive = mmc_sd_alive,
+	.shutdown = mmc_sd_suspend,
 };
 
 static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
@@ -1181,6 +1182,7 @@ static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
 	.resume = mmc_sd_resume,
 	.power_restore = mmc_sd_power_restore,
 	.alive = mmc_sd_alive,
+	.shutdown = mmc_sd_suspend,
 };
 
 static void mmc_sd_attach_bus_ops(struct mmc_host *host)