wifi: nrf_wifi: ignore interface if TX disabled

Automatically hide the nRF7x interface from the connection manager if
the TX path is disabled (scan only mode). This prevents function calls
like `conn_mgr_all_if_up(true)` from bringing up the interface which
can never result in a connection.

Signed-off-by: Jordan Yates <jordan@embeint.com>

Author: JordanYates

drivers/wifi/nrf_wifi/src/net_if.c

@@ -18,6 +18,7 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(wifi_nrf, CONFIG_WIFI_NRF70_LOG_LEVEL);
 
+#include <zephyr/net/conn_mgr_monitor.h>
 #include <zephyr/sys/reboot.h>
 
 #include "net_private.h"
@@ -702,6 +703,11 @@ void nrf_wifi_if_init_zep(struct net_if *iface)
 		    nrf_wifi_net_iface_work_handler);
 #endif /* CONFIG_NRF70_DATA_TX */
 
+#ifdef CONFIG_NRF70_SCAN_ONLY
+	/* In scan only mode this interface should be ignored by the connectivity manager */
+	conn_mgr_ignore_iface(iface);
+#endif /* CONFIG_NRF70_SCAN_ONLY */
+
 #ifdef CONFIG_NRF_WIFI_RPU_RECOVERY
 	k_work_init(&vif_ctx_zep->nrf_wifi_rpu_recovery_work,
 		    nrf_wifi_rpu_recovery_work_handler);