Enable SDMA support on i.mx8mq/8mm chips, including enabling
CONFIG_FW_LOADER_USER_HELPER/CONFIG_FW_LOADER_USER_HELPER_FALLBACK
for firmware loaded by udev.
Signed-off-by: NRobin Gong <yibin.gong@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>