ARM: at91/dt: at91sam9m10g45ek use stdout-path

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

arch/arm/boot/dts/at91sam9m10g45ek.dts

@@ -15,7 +15,8 @@
 	compatible = "atmel,at91sam9m10g45ek", "atmel,at91sam9g45", "atmel,at91sam9";
 
 	chosen {
-		bootargs = "mem=64M console=ttyS0,115200 root=/dev/mtdblock1 rw rootfstype=jffs2";
+		bootargs = "mem=64M root=/dev/mtdblock1 rw rootfstype=jffs2";
+		stdout-path = "serial0:115200n8";
 	};
 
 	memory {