mesh: Add missing action to cancel timer

IEEE Std 802.11-2012 Table 13-2, MPM finite state machine requires to
clear retryTimer when CNF_ACPT event occurs in OPN_SNT state which is
missing, so add it to comply with the standard.

This was found while debugging an MTK issue and this commit fixes a
potential issue that mesh sends invalid event (PLINK_OPEN) which will
lead another invalid timer register such as MeshConfirm Timer. This
behaviour might lead to undefined mesh state.

Signed-off-by: Peter Oh <poh@qca.qualcomm.com>

wpa_supplicant/mesh_mpm.c

@@ -874,6 +874,7 @@ static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
 			break;
 		case CNF_ACPT:
 			wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
+			eloop_cancel_timeout(plink_timer, wpa_s, sta);
 			eloop_register_timeout(
 				conf->dot11MeshConfirmTimeout / 1000,
 				(conf->dot11MeshConfirmTimeout % 1000) * 1000,