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: 2cedfe1247c0 ("arm64: dts: specify console via command line")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arm64: dts: specify console via command line

The SPRD serial driver need to know which serial port would be used as
console in an early period during initialization, otherwise console
init would fail since we added this feature[1].

So this patch add console to command line via devicetree.

[1] https://lore.kernel.org/lkml/20190826072929.7696-4-zhang.lyra@gmail.com/

Link: https://lore.kernel.org/r/20200311112120.30890-1-zhang.lyra@gmail.com
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arm64: dts: Add Unisoc's SC9863A SoC support

Add basic DT to support Unisoc's SC9863A, with this patch,
the board sp9863a-1h10 can run into console.

Link: https://lore.kernel.org/r/20191223092948.24824-4-zhang.lyra@gmail.com
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Olof Johansson <olof@lixom.net>