rtw88: prepend kernel.makeFlags to makeFlags, pass moduleBuildDependencies

pkgs/os-specific/linux/rtw88/default.nix

···
     hash = "sha256-PRzWXC1lre8gt1GfVdnaG836f5YK57P9a8tG20yef0w=";
   };
 
-  makeFlags = [ "KSRC=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build" ];
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+  makeFlags = kernel.makeFlags ++ [ "KSRC=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build" ];
 
   enableParallelBuilding = true;