iwlwifi: mvm: disable P2P queue on mac context release

AP queue is properly released, but P2P queue isn't.

Fixes: commit 4c965139 ("iwlwifi: mvm: support p2p device frames tx on dqa queue #2")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>