Bluetooth: MGMT: Fix not exposing debug UUID on MGMT_OP_READ_EXP_FEATURES_INFO

The debug UUID was only getting set if MGMT_OP_READ_EXP_FEATURES_INFO
was not called with a specific index which breaks the likes of
bluetoothd since it only invokes MGMT_OP_READ_EXP_FEATURES_INFO when an
adapter is plugged, so instead of depending hdev not to be set just
enable the UUID on any index like it was done with iso_sock_uuid.

Fixes: e625e50ceee1 ("Bluetooth: Introduce debug feature when dynamic debug is disabled")
Signed-off-by: Luiz Augusto von Dentz <[e-mail]>

net/bluetooth/mgmt.c

···
 		return -ENOMEM;
 
 #ifdef CONFIG_BT_FEATURE_DEBUG
-	if (!hdev) {
-		flags = bt_dbg_get() ? BIT(0) : 0;
+	flags = bt_dbg_get() ? BIT(0) : 0;
 
-		memcpy(rp->features[idx].uuid, debug_uuid, 16);
-		rp->features[idx].flags = cpu_to_le32(flags);
-		idx++;
-	}
+	memcpy(rp->features[idx].uuid, debug_uuid, 16);
+	rp->features[idx].flags = cpu_to_le32(flags);
+	idx++;
 #endif
 
 	if (hdev && hci_dev_le_state_simultaneous(hdev)) {