Deduplicate defconfigs for all DH i.MX8MP DHSOM by factoring out the
common parts into generic _dhsom_defconfig and including those using
the #include <configs/...> preprocessor macro, which is applicable to
defconfigs as well. This enables CMD_EXPORTENV on all iMX8MP DHSOM
systems to be consistent with other DHSOM systems.

Signed-off-by: Marek Vasut <marex@denx.de>

Neither the DRC02 nor PicoITX carrier board contains the PCA954x I2C mux
chip, the chip is only present on PDK3 carrier board. Disable support for
the PCA954x mux chip and I2C mux altogether on both i.MX8MP DHCOM DRC02 and
PicoITX.

Signed-off-by: Marek Vasut <marex@denx.de>

The DRC02 carrier board does not expose PCIe in any way, disable PCIe support.

Signed-off-by: Marek Vasut <marex@denx.de>

Make sure DM regulator support is enabled on this board, just like on all
the other DH i.MX8MP DHCOM SoM based boards.

Signed-off-by: Marek Vasut <marex@denx.de>

Rsync all defconfig files using moveconfig.py

Signed-off-by: Tom Rini <trini@konsulko.com>

Add support for DH electronics i.MX8MP DHCOM SoM on DRC02 carrier board.
This system is populated with two ethernet ports, two CANs, RS485 and RS232,
USB, capacitive buttons and an OLED display.

Matching Linux kernel patch has been posted:
https://lore.kernel.org/imx/20240925160343.84388-2-marex@denx.de/

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>