Revert "Do not copy sqfs image to RAM"

This reverts commit 42d794561c1f3809f95299e4aa04cd3f28d4239b.
My bad. Bad logic on removing, it was an option anyway.

hooks/archiso

@@ -14,7 +14,11 @@ run_hook ()
         exit 1
     fi
 
-    squashimg="${BOOT_MOUNT}/archlive.sqfs"
+    squashimg="${BOOT_MOUNT}/archiso.sqfs"
+    if [ "${copytoram}" = "y" ]; then
+        /bin/cat ${squashimg} > /tmpfs/archiso.sqfs
+        squashimg="/tmpfs/archiso.sqfs"
+    fi
 
     msg ":: Mounting squashfs image"
     /bin/modprobe -q squashfs >/dev/null 2>&1