i.MX defconfig update for 5.4: - Enable pinctrl and clock driver support for i.MX8MN SoC. - Enable SDMA support for i.MX8MQ and i.MX8MM SoC, including FW_LOADER_USER_HELPER and FW_LOADER_USER_HELPER_FALLBACK to support SDMA firmware loading via udev. - Enable module build of i.MX8 DDR PMU driver and ETNAVIV GPU driver. - Enable module build of OV5645 camera driver in imx_v6_v7_defconfig.