ARM: dts: add sdio blocks to bcm28155-ap board

Enable sdio for bcm28155 AP board
Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>

arch/arm/boot/dts/bcm28155-ap.dts

@@ -26,4 +26,20 @@ memory {
 	uart@3e000000 {
 		status = "okay";
 	};
+
+	sdio1: sdio@3f180000 {
+		max-frequency = <48000000>;
+		status = "okay";
+	};
+
+	sdio2: sdio@3f190000 {
+		non-removable;
+		max-frequency = <48000000>;
+		status = "okay";
+	};
+
+	sdio4: sdio@3f1b0000 {
+		max-frequency = <48000000>;
+		status = "okay";
+	};
 };