wlcore: don't attempt to roam in case of p2p

For STA we report beacon loss to higher levels so that wpa_s
can attempt to roam without disconnecting. In case of P2P CLI
we don't want to attempt roaming and instead disconnect immediately
upon beacon loss.

Signed-off-by: Eyal Shapira <eyal@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>