rockchip: veyron: Add serial, logging, silent console support

rockchip: veyron: Add serial, logging, silent console support

Commit eba768c54587 ("rockchip: jerry: Add serial support") enables
ROCKCHIP_SERIAL for chromebook_jerry to make the serial console work
correctly. Enable it also for other veyron boards.

Also enable logging and disable scrolling multiple lines at once as in
chromebook_jerry, and enable silent console as chromebook_minnie does.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>