ARM: shmobile: koelsch dts: Drop console= bootargs parameter

Koelsch is now restricted to booting from DT, so chosen/stdout-path is
always used, and we can drop the "console=" parameter from chosen/bootargs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: devicetree@vger.kernel.org
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

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

@@ -25,7 +25,7 @@ aliases {
 	};
 
 	chosen {
-		bootargs = "console=ttySC6,115200 ignore_loglevel rw root=/dev/nfs ip=dhcp";
+		bootargs = "ignore_loglevel rw root=/dev/nfs ip=dhcp";
 		stdout-path = &scif0;
 	};