ARM: mxc: add a dma mask to fec devices

This is not strictly necessary but the right thing to do.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/devices/platform-fec.c b/arch/arm/plat-mxc/devices/platform-fec.c
index 4f52996..6561c9df 100644
--- a/arch/arm/plat-mxc/devices/platform-fec.c
+++ b/arch/arm/plat-mxc/devices/platform-fec.c
@@ -62,7 +62,7 @@
 		},
 	};
 
-	return imx_add_platform_device("fec", 0 /* -1? */,
+	return imx_add_platform_device_dmamask("fec", 0,
 			res, ARRAY_SIZE(res),
-			pdata, sizeof(*pdata));
+			pdata, sizeof(*pdata), DMA_BIT_MASK(32));
 }