package/qemu: do not support x86_steamroller or x86_core_avx2
These CPU's cause segfaults with qemu.
Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 1f7efaf89f03e793252f9e97885a937cd6d67c56)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>