ARM: at91/dt: at91sam9x5ek: use stdout-path

Use stdout-path to specify the console and remove the console argument from
the kernel command line.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91sam9x5ek.dtsi

@@ -13,7 +13,8 @@ / {
 	compatible = "atmel,at91sam9x5ek", "atmel,at91sam9x5", "atmel,at91sam9";
 
 	chosen {
-		bootargs = "console=ttyS0,115200 root=/dev/mtdblock1 rw rootfstype=ubifs ubi.mtd=1 root=ubi0:rootfs";
+		bootargs = "root=/dev/mtdblock1 rw rootfstype=ubifs ubi.mtd=1 root=ubi0:rootfs";
+		stdout-path = "serial0:115200n8";
 	};
 
 	ahb {