mx25: add support for the DryIce rtc

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/plat-mxc/include/mach/mx25.h b/arch/arm/plat-mxc/include/mach/mx25.h
index 021d208..61052a3 100644
--- a/arch/arm/plat-mxc/include/mach/mx25.h
+++ b/arch/arm/plat-mxc/include/mach/mx25.h
@@ -32,7 +32,9 @@
 
 #define MX25_FEC_BASE_ADDR		0x50038000
 #define MX25_NFC_BASE_ADDR		0xbb000000
+#define MX25_DRYICE_BASE_ADDR		0x53ffc000
 
+#define MX25_INT_DRYICE	25
 #define MX25_INT_FEC	57
 #define MX25_INT_NANDFC	33