ARM: shmobile: Update KZM9D dts command line

Update the KZM9D DTS command line to remove following cruft:
 - console=tty0 - no graphic support upstream anyway
 - earlyprintk= - not supported by the 8250-em driver anyway
 - mem= - this is provided via DT anyway
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/emev2-kzm9d.dts

@@ -21,6 +21,6 @@ memory {
 	};
 
 	chosen {
-		bootargs = "console=tty0 console=ttyS1,115200n81 earlyprintk=serial8250-em.1,115200n81 mem=128M@0x40000000 ignore_loglevel root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096";
+		bootargs = "console=ttyS1,115200n81 ignore_loglevel root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096";
 	};
 };