rename wwan-related modules/services

we only currently support huawei e3372/cdc ncm so let's make that
explicit in the naming

modules/wwan/default.nix

@@ -0,0 +1,31 @@
+{ config, pkgs, lib, ... }:
+let
+  inherit (pkgs) liminix;
+  inherit (lib) mkOption types;
+in {
+  imports = [
+    ../service-trigger
+  ];
+
+  options = {
+    system.service.wwan.huawei-e3372 = mkOption {
+      type = liminix.lib.types.serviceDefn;
+    };
+  };
+  config = {
+    kernel.config = {
+      USB_NET_HUAWEI_CDC_NCM = "y";
+      USB_USBNET = "y";
+      USB_SERIAL = "y";
+      USB_SERIAL_OPTION = "y";
+    };
+
+    # https://www.0xf8.org/2017/01/flashing-a-huawei-e3372h-4g-lte-stick-from-hilink-to-stick-mode/
+    system.service.wwan.huawei-e3372 = config.system.callService ./huawei-e3372.nix {
+      apn = mkOption { type = types.str; };
+      username = mkOption { type = types.str; };
+      password = mkOption { type = types.str; };
+      authType = mkOption { type = types.enum [ "pap" "chap" ]; };
+    };
+  };
+}