ARM: shmobile: porter: enable SATA0

Enable SATA0 device for the Porter board.

This patch is analogous to the commit 5a62ec57 ("ARM: shmobile:
henninger: enable SATA0") as there are no differences between the boards
in this respect.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791-porter.dts

@@ -154,3 +154,7 @@ &sdhi2 {
 	cd-gpios = <&gpio6 22 GPIO_ACTIVE_LOW>;
 	status = "okay";
 };
+
+&sata0 {
+	status = "okay";
+};