i.MX defconfig updates for 5.1: - Enable a number of i.MX SoC and driver options in arm64 defconfig. The built-in drivers include: clock, pinctrl, power domain, serial, MBox, SCU, Ethernet, MMC, regulator and watchdog, which are mostly essential for building an useful kernel image for i.MX8 platform, booting with rootfs on NFS or eMMC.