mk_mmc.sh: factor out, as all call neuter_flash_kernel

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

mk_mmc.sh

@@ -950,17 +950,12 @@ initrd_preseed_settings () {
 	cd ${TEMPDIR}/initrd-tree/
 
 	cp -v "${DIR}/lib/${deb_distribution}-finish.sh" ${TEMPDIR}/initrd-tree/usr/bin/finish-install.sh
-
-	case "${DIST}" in
-	trusty|utopic|wheezy|jessie)
-		neuter_flash_kernel
-		;;
-	esac
-
 	if [ "x${conf_smart_uboot}" = "xenable" ] ; then
 		sed -i -e 's:smart_DISABLED:enable:g' ${TEMPDIR}/initrd-tree/usr/bin/finish-install.sh
 	fi
 
+	neuter_flash_kernel
+
 	finish_installing_device
 	setup_parition_recipe
 	cp -v "${DIR}/lib/shared/zz-uenv_txt" ${TEMPDIR}/initrd-tree/zz-uenv_txt