linux-oniro-tweaks-all.inc: Define defconfig for qemuarm64-efi based on arm64 defconfig

The arm64 defconfig file provides the initial support for this machine
but it also provides a good set of extra configs unrelated to qemu. Some
even generate build warnings due to some configs being dependent on some
that are not enabled. As an initial solution we pull the defconfig in
the layer and drop the problematic (warning generating) configs. The
plan is to drop it in the future for a config fragment for qemu efi boot
and reuse the existing BSP configuration from yocto-kernel-cache of the
equivalent qemuarm64 machine.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>