DFS: Add forgotten break statement

The VHT_CHANWIDTH_160MHZ case fell through to the default case and
printed out a debug message that was not supposed to be shown here.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/ap/dfs.c

@@ -138,6 +138,7 @@ static void dfs_adjust_vht_center_freq(struct hostapd_data *hapd,
 	case VHT_CHANWIDTH_160MHZ:
 		hapd->iconf->vht_oper_centr_freq_seg0_idx =
 						chan->chan + 14;
+		break;
 	default:
 		wpa_printf(MSG_INFO, "DFS only VHT20/40/80/160 is supported now");
 		break;