ARM: shmobile: armadillo800eva-reference: Remove early_printk from command line

As early printk is not supported when devices are initialised
using DT, so remove it from the command line.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts

@@ -20,7 +20,7 @@ / {
 	compatible = "renesas,armadillo800eva-reference", "renesas,r8a7740";
 
 	chosen {
-		bootargs = "console=tty0 console=ttySC1,115200 earlyprintk=sh-sci.1,115200 ignore_loglevel root=/dev/nfs ip=dhcp rw";
+		bootargs = "console=tty0 console=ttySC1,115200 ignore_loglevel root=/dev/nfs ip=dhcp rw";
 	};
 
 	memory {