virgl driver should be enabled for qemux86/qemux86-64 machines, or else
it will cause runtime issue due to virtio_gpu driver missing.
(From OE-Core rev: 5f143ceb1fac06ac84370ceb0cf0fba656effdf8)
Signed-off-by: Ming Liu <liu.ming50@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>