video: rockchip: Add support for RK3399 to dw-mipi-dsi bridge

video: rockchip: Add support for RK3399 to dw-mipi-dsi bridge

This just needs some extra clocks enabled, and different registers
configured. Copied from Linux, just like the original submitter
of this driver did for rk3568.

Tested on Pinephone Pro.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Philipp Tomsich <philipp.tomsich@vrull.eu>
Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>