Add support for both the BananaPi BPI-CM4 module and the BananaPi baseboard which is compatible with the RaspberryPi CM4IO baseboard. The BananaPi BPI-CM4 module follows the CM4 specifications at [1], but with a single HDMI port and a single DSI output. The current CM4IO baseboard DT should work fine on the Raspberry CM4 baseboard and other derivatives baseboards, but proper DT should be written for other baseboards. The DT is imported from the submission done at [2] and applied at [3], the u-boot support was submitted at [4]. [1] https://datasheets.raspberrypi.com/cm4io/cm4io-datasheet.pdf [2] https://lore.kernel.org/all/20230303-topic-amlogic-upstream-bpi-cm4-v2-0-2ecfde76fc4d@linaro.org/ [3] https://git.kernel.org/amlogic/c/0262f2736978b1763363224698f47112a148dab0 [4] https://lore.kernel.org/all/20230307-u-boot-cm4-v1-0-43f5a393cd37@linaro.org/ Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
