arm64: dts: Revert "specify console via command line"

I accidentally merged this after requesting a different solution,
reverting now.

Link: https://patchwork.kernel.org/patch/11431397/
Fixes: 2cedfe12 ("arm64: dts: specify console via command line")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

arch/arm64/boot/dts/sprd/sp9863a-1h10.dts

@@ -26,7 +26,7 @@
 
 	chosen {
 		stdout-path = "serial1:115200n8";
-		bootargs = "earlycon console=ttyS1";
+		bootargs = "earlycon";
 	};
 };