P2P: Don't delete group on non P2P interfaces (UPSTREAM)

p2p_group_remove * calls wpas_p2p_disconnect on all
interfaces including non P2P ones. This has undesired
effects such as disconnecting concurrent connected STA
interfaces as well as emitting P2P-GROUP-REMOVED events
on all interfaces including ones that didn't actually
have a P2P CLI or GO running.
Instead fail explicitly when attempting to p2p disconnect
an interface with no P2P activity.

Signed-off-by: Eyal Shapira <eyal@wizery.com>
Signed-off-by: Victor Goldenshtein <victorg@ti.com>