mmc: Add a deferred_probe() API

Add a deferred_probe() API for platforms that want to do some
configurations just before starting to enumerate the device.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 0b90a97..c75892a 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -138,6 +138,21 @@
 	return dm_mmc_host_power_cycle(mmc->dev);
 }
 
+int dm_mmc_deferred_probe(struct udevice *dev)
+{
+	struct dm_mmc_ops *ops = mmc_get_ops(dev);
+
+	if (ops->deferred_probe)
+		return ops->deferred_probe(dev);
+
+	return 0;
+}
+
+int mmc_deferred_probe(struct mmc *mmc)
+{
+	return dm_mmc_deferred_probe(mmc->dev);
+}
+
 int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
 {
 	int val;
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index b50fcbf..a347308 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -2845,7 +2845,9 @@
 	 */
 	mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(SD_LEGACY) |
 			 MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT;
-
+#if CONFIG_IS_ENABLED(DM_MMC)
+	mmc_deferred_probe(mmc);
+#endif
 #if !defined(CONFIG_MMC_BROKEN_CD)
 	no_card = mmc_getcd(mmc) == 0;
 #else