extract common config for qemu devices into module

devices/qemu/default.nix

@@ -37,61 +37,18 @@
 
   '';
   module = {pkgs, config, lim, ... }: {
-    imports = [ ../../modules/arch/mipseb.nix ];
+    imports = [
+      ../../modules/arch/mipseb.nix
+      ../families/qemu.nix
+    ];
     kernel = {
-      src = pkgs.pkgsBuildBuild.fetchurl {
-        name = "linux.tar.gz";
-        url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.15.71.tar.gz";
-        hash = "sha256-yhO2cXIeIgUxkSZf/4aAsF11uxyh+UUZu6D1h92vCD8=";
-      };
       config = {
         MIPS_MALTA= "y";
         CPU_MIPS32_R2= "y";
 
-        MTD = "y";
-        MTD_BLOCK = "y";
-        MTD_CMDLINE_PARTS = "y";
-        MTD_PHRAM = "y";
-
-        VIRTIO_MENU = "y";
-        PCI = "y";
-        VIRTIO_PCI = "y";
-        BLOCK = "y";
-        VIRTIO_BLK = "y";
-        VIRTIO_NET = "y";
-
         SERIAL_8250= "y";
         SERIAL_8250_CONSOLE= "y";
       };
     };
-    hardware =
-      let
-        mac80211 =  pkgs.mac80211.override {
-          drivers = ["mac80211_hwsim"];
-          klibBuild = config.system.outputs.kernel.modulesupport;
-        };
-      in {
-        defaultOutput = "vmroot";
-        rootDevice = "/dev/mtdblock0";
-        flash.eraseBlockSize = 65536;
-        networkInterfaces =
-          let inherit (config.system.service.network) link;
-          in {
-            wan = link.build {
-              devpath = "/devices/pci0000:00/0000:00:13.0/virtio0";
-              ifname = "wan";
-            };
-            lan = link.build {
-              devpath = "/devices/pci0000:00/0000:00:14.0/virtio1";
-              ifname = "lan";
-            };
-
-            wlan_24 = link.build {
-              ifname = "wlan0";
-              dependencies = [ mac80211 ];
-            };
-          };
-      };
-
   };
 }