gflt200: enabled support for the pcf8523.

Disabled support for Avanta internal RTC.

Change-Id: I9d75a5652bf25b0e25ac01cfef1906d5d39ee0c7
diff --git a/include/configs/gflt200.h b/include/configs/gflt200.h
index 9224e36..7490d56 100644
--- a/include/configs/gflt200.h
+++ b/include/configs/gflt200.h
@@ -2,4 +2,9 @@
 /* configs/mv_kw2.h defines __CONFIG_H */
 #include <configs/mv_kw2.h>
 
+#undef MV_INCLUDE_RTC
+
+#define CONFIG_RTC_PCF8523
+#define CONFIG_SYS_I2C_RTC_ADDR	0x68
+
 #endif /* __CONFIG_H */