rtc: add support for rv3028 rtc

Add support for rtc3028 rtc from microcrystal.
based on linux dirver:
commit a38fd8748464: ("Linux 5.12-rc2")

Signed-off-by: Heiko Schocher <hs@denx.de>

Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index dafba35..c84a9d2 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -102,6 +102,12 @@
 	  If you say yes here you get support for the Philips PCF8563 RTC
 	  and compatible chips.
 
+config RTC_RV3028
+	bool "Enable RV3028 driver"
+	depends on DM_RTC
+	help
+	  The MicroCrystal RV3028 is a I2C Real Time Clock (RTC)
+
 config RTC_RV3029
 	bool "Enable RV3029 driver"
 	depends on DM_RTC