This reverts commit 24ff52ba3b.
The original patch was my bad. The patches for oe-core were re-worked,
but I forgot the recall this patch.
In fact, inheriting qemu is needed because it sets a clear barriar
for people to use qemu user mode. And the QEMU_OPTIONS settings
are also in qemu.bbclass.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>