drivers/rtc: convert mvrtc to DM

Add DM support for the Marvell RTC driver.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 277dc3d..a3f8c8a 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -48,6 +48,13 @@
 	help
 	  Support for Epson RX8010SJ Real Time Clock devices.
 
+config RTC_MV
+	bool "Enable Marvell RTC driver"
+	depends on DM_RTC
+	help
+	  Enable Marvell RTC driver. This driver supports the rtc that is present
+	  on some Marvell SoCs.
+
 config RTC_S35392A
 	bool "Enable S35392A driver"
 	select BITREVERSE