ARM: dts: i.MX50: Add i2c, mmc and spi aliases

Using aliases, the devices will be enumerated properly.
Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx50.dtsi

@@ -26,11 +26,21 @@ aliases {
 		gpio3 = &gpio4;
 		gpio4 = &gpio5;
 		gpio5 = &gpio6;
+		i2c0 = &i2c1;
+		i2c1 = &i2c2;
+		i2c2 = &i2c3;
+		mmc0 = &esdhc1;
+		mmc1 = &esdhc2;
+		mmc2 = &esdhc3;
+		mmc3 = &esdhc4;
 		serial0 = &uart1;
 		serial1 = &uart2;
 		serial2 = &uart3;
 		serial3 = &uart4;
 		serial4 = &uart5;
+		spi0 = &ecspi1;
+		spi1 = &ecspi2;
+		spi2 = &cspi;
 	};
 
 	cpus {