ufs: ufs-renesas: Add support for Renesas R-Car UFS controller

Add support for Renesas R-Car UFS controller which needs vendor-specific
initialization.

Ported from Linux kernel as of commit
c2ab666072bc ("scsi: ufs: Explicitly include correct DT includes")

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/ufs/Makefile b/drivers/ufs/Makefile
index 62ed016..4f3344f 100644
--- a/drivers/ufs/Makefile
+++ b/drivers/ufs/Makefile
@@ -6,3 +6,4 @@
 obj-$(CONFIG_UFS) += ufs.o ufs-uclass.o
 obj-$(CONFIG_CADENCE_UFS) += cdns-platform.o
 obj-$(CONFIG_TI_J721E_UFS) += ti-j721e-ufs.o
+obj-$(CONFIG_UFS_RENESAS) += ufs-renesas.o