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>
