P2P: Do not indicate P2P_FIND failure if p2p_scan is in progress

It was possible to FAIL return for a P2P_FIND command that was issued
while an already started P2P_FIND operation was in the scan phase. This
can be confusing for upper layer software, so hide the failure report
from the ctrl_iface response. The previously started scan will continue
the find operation after this.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

src/p2p/p2p.c

@@ -1049,6 +1049,7 @@ int p2p_find(struct p2p_data *p2p, unsigned int timeout,
 	} else if (p2p->p2p_scan_running) {
 		p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
 		/* wait for the previous p2p_scan to complete */
+		res = 0; /* do not report failure */
 	} else {
 		p2p_dbg(p2p, "Failed to start p2p_scan");
 		p2p_set_state(p2p, P2P_IDLE);