mkinitramfs: Enhanced linux26 integration to use the original initrd.img instead of the one at /boot when possible

base/mkinitramfs/pkg_linux26_post.conf

@@ -12,13 +12,13 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-hook_add postdoc 5 'mkinitrd_run'
+. package/*/mkinitramfs/find_template.in
+
+hook_add postdoc 5 "mkinitrd_run $initrd_img"
 
 mkinitrd_run() {
-	if pkginstalled mkinitramfs; then
-		echo_status "running mkinitramfs ..."
-		sh "$root$( pkgprefix sbindir mkinitramfs )/mkinitramfs" -R "${root:-/}" "${lx_kernelrelease}"
-	else
-		echo_warning "mkinitramfs is missing."
-	fi
+	local template="$1"
+	sh "$root$( pkgprefix sbindir mkinitramfs )/mkinitramfs" -R "${root:-/}" \
+		${template:+-T $template} "${lx_kernelrelease}"
 }
+