media: platform: synopsys: Add support for HDMI input driver

Add initial support for the Synopsys DesignWare HDMI RX
Controller Driver used by Rockchip RK3588. The driver
supports:
- HDMI 1.4b and

media: platform: synopsys: Add support for HDMI input driver

Add initial support for the Synopsys DesignWare HDMI RX
Controller Driver used by Rockchip RK3588. The driver
supports:
- HDMI 1.4b and 2.0 modes (HDMI 4k@60Hz)
- RGB888, YUV422, YUV444 and YCC420 pixel formats
- CEC
- EDID configuration

The hardware also has Audio and HDCP capabilities, but these are
not yet supported by the driver.

Co-developed-by: Dingxian Wen <[email protected]>
Signed-off-by: Dingxian Wen <[email protected]>
Signed-off-by: Shreeya Patel <[email protected]>
Signed-off-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>

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