desktop: expose kernel-arguments as a variable

* .guix/rekahsoft/guix-config/desktop.scm: New variable %rkd-desktop-kernel-arguments

.guix/rekahsoft/guix-config/desktop.scm

@@ -15,6 +15,7 @@
   #:use-module (nongnu packages linux)
   #:use-module (nongnu system linux-initrd)
   #:export (%rkd-desktop-services
+            %rkd-desktop-kernel-arguments
             rkd-desktop))
 
 (define %rkd-desktop-services
@@ -76,6 +77,10 @@
                                        )"))
                                                  %default-authorized-guix-keys)))))))
 
+(define %rkd-desktop-kernel-arguments
+  (cons* "resume=/dev/mapper/vg0-swap"
+         %default-kernel-arguments))
+
 (define (rkd-desktop host-name root-uuid efi-boot-uuid)
   (operating-system
     (host-name host-name)
@@ -94,9 +99,7 @@
 
     ;; Use non-free kernel, intel microcode and proprietary firmware
     (kernel linux)
-    (kernel-arguments
-     (cons* "resume=/dev/mapper/vg0-swap"
-            %default-kernel-arguments))
+    (kernel-arguments %rkd-desktop-kernel-arguments)
     (initrd microcode-initrd)
     (firmware (list linux-firmware))