UPSTREAM: drm: bridge: dw-hdmi: Switch to V4L bus format and encodings

UPSTREAM: drm: bridge: dw-hdmi: Switch to V4L bus format and encodings

Switch code to use the newly introduced V4L bus formats IDs instead of custom
defines. Also use the V4L encoding defines.

Some display pipelines can only provide non-RBG input pixels to the HDMI TX
Controller, this patch takes the pixel format from the plat_data if provided.

Change-Id: I2b70ed0f3cab8c6873bb407977738677375b24b0
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
(cherry picked from commit def23aa7e9821a3dfe3fb7b139dd0229a89fdeb0)