mmc: am654_sdhci: Add Support for PHY

Add support in the driver for handling phy specific registers.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 98d3f7a..4cdae41 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -473,6 +473,7 @@
 	depends on ARCH_K3
 	depends on MMC_SDHCI
 	depends on DM_MMC && OF_CONTROL && BLK
+	depends on REGMAP
 	help
 	  Support for Secure Digital Host Controller Interface (SDHCI)
 	  controllers present on TI's AM654 SOCs.