configs: socfpga: socrates: enable rtc support

This enables DM_RTC and RTC_M41T62 to enable support for the rtc on the
socrates board.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/socfpga_socrates_defconfig b/configs/socfpga_socrates_defconfig
index 45fd78a..242d938 100644
--- a/configs/socfpga_socrates_defconfig
+++ b/configs/socfpga_socrates_defconfig
@@ -61,6 +61,8 @@
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_MII=y
 CONFIG_DM_RESET=y
+CONFIG_DM_RTC=y
+CONFIG_RTC_M41T62=y
 CONFIG_SPI=y
 CONFIG_CADENCE_QSPI=y
 CONFIG_DESIGNWARE_SPI=y