rtc: add support for Micro Crystal RV-3029-C2 RTC

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 916d73f..e4be4a4 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -60,6 +60,7 @@
 COBJS-$(CONFIG_RTC_PT7C4338) += pt7c4338.o
 COBJS-$(CONFIG_RTC_RS5C372A) += rs5c372.o
 COBJS-$(CONFIG_RTC_RTC4543) += rtc4543.o
+COBJS-$(CONFIG_RTC_RV3029) += rv3029.o
 COBJS-$(CONFIG_RTC_RX8025) += rx8025.o
 COBJS-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o
 COBJS-$(CONFIG_RTC_S3C44B0) += s3c44b0_rtc.o