kbd-state: fix autorepeat handling

kbd-state: fix autorepeat handling

When allowing multiple down-events in a row (key autorepeat) we can't
use change_bit() any more to update the state, because autorepeat events
don't change the key state.  We have to explicitly use set_bit() and
clear_bit() instead.

Cc: qemu-stable@nongnu.org
Fixes: 35921860156e kbd-state: don't block auto-repeat events
Buglink: https://bugs.launchpad.net/qemu/+bug/1828272
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20190514042443.10735-1-kraxel@redhat.com
(cherry picked from commit 5fff13f245cddd3bc260dfe6ebe1b1f05b72116f)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>