rtc: move RTC_RX8025 to Kconfig

move RTC_RX8025 to Kconfig and fixup board configs.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/vme8349_defconfig b/configs/vme8349_defconfig
index 77c7904..f6b9eb6 100644
--- a/configs/vme8349_defconfig
+++ b/configs/vme8349_defconfig
@@ -114,6 +114,7 @@
 CONFIG_SYS_FLASH_CFI=y
 CONFIG_PHY_MARVELL=y
 CONFIG_TSEC_ENET=y
+CONFIG_RTC_RX8025=y
 CONFIG_BAUDRATE=9600
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y