mx25pdk: Enable imxdi RTC

The mx25pdk board supports the i.MX25 DryIce RTC (imxdi), so enable it. This
allows to compile-test the imxdi driver in the mainline tree.
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>
Acked-by: NFabio Estevam <fabio.estevam@freescale.com>

include/configs/mx25pdk.h

@@ -124,6 +124,10 @@
 #define CONFIG_SYS_I2C_BASE		IMX_I2C_BASE
 #define CONFIG_SYS_I2C_SPEED		100000
 
+/* RTC */
+#define CONFIG_RTC_IMXDI
+#define CONFIG_CMD_DATE
+
 /* Ethernet Configs */
 
 #define CONFIG_CMD_PING