wlcore: ignore dummy packet events in PLT mode
wlcore: ignore dummy packet events in PLT mode

Sometimes the firmware sends a dummy packet event while we are in PLT
mode.  This doesn't make sense, it's a firmware bug.  Fix this by
ignoring dummy packet events when we're PLT mode.

Reported-by: Yegor Yefremov <379041fa42359f10443de1f461b1b247ec449fae@googlemail.com>
Reported-by: Arik Nemtsov <1a5d131848a166677cc209f94fa988cee9378c32@wizery.com>
Signed-off-by: Luciano Coelho <a05bd890c4868ea1807f8564055d1fba77c6ba81@coelho.fi>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs