mmc: sdhci-cadence: Add support for Cadence sdmmc v6

Cadence SDMMC v6 controller has a lot of changes on initialize
compared to v4 controller. PHY is needed by v6 controller.

Signed-off-by: Kuan Lim Lee <kuanlim.lee@starfivetech.com>
Co-developed-by: Alex Soo <yuklin.soo@starfivetech.com>
Signed-off-by: Wei Liang Lim <weiliang.lim@starfivetech.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 72c3fb6..235c477 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -60,6 +60,7 @@
 obj-$(CONFIG_MMC_SDHCI_BCM2835)		+= bcm2835_sdhci.o
 obj-$(CONFIG_MMC_SDHCI_BCMSTB)		+= bcmstb_sdhci.o
 obj-$(CONFIG_MMC_SDHCI_CADENCE)		+= sdhci-cadence.o
+obj-$(CONFIG_MMC_SDHCI_CADENCE)		+= sdhci-cadence6.o
 obj-$(CONFIG_MMC_SDHCI_CV1800B)		+= cv1800b_sdhci.o
 obj-$(CONFIG_MMC_SDHCI_AM654)		+= am654_sdhci.o
 obj-$(CONFIG_MMC_SDHCI_IPROC)		+= iproc_sdhci.o