uboot-phytec

efi_loader: enable CONFIG_CMD_NVEDIT_EFI on QEMU

To reduce the default image size CONFIG_CMD_NVEDIT_EFI was disabled by
default. Re-enable it on the QEMU platforms supporting the UEFI sub-system.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>