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/Kconfig b/drivers/ufs/Kconfig
index 69ea18e..0e0cc58 100644
--- a/drivers/ufs/Kconfig
+++ b/drivers/ufs/Kconfig
@@ -21,4 +21,13 @@
 	  This selects the glue layer driver for Cadence controller
 	  present on TI's J721E devices.
 
+config UFS_RENESAS
+	bool "Renesas specific hooks to UFS controller platform driver"
+	depends on UFS
+	select BOUNCE_BUFFER
+	help
+	  This selects the Renesas specific additions to UFSHCD platform driver.
+	  UFS host on Renesas needs some vendor specific configuration before
+	  accessing the hardware.
+
 endmenu