arm64 is excluded in dimm support check list

[jongwu]

in dimm support check func, arm64 is excluded. but arm64 does support memory dimm in qemu.

isDimmSupported(config *Config) bool { switch runtime.GOARCH { case "amd64", "386", "ppc64le": if config != nil && config.Machine.Type == MachineTypeMicrovm { // microvm does not support NUMA return false }