grub-mkonfig: Look for Image-* on aarch64

--- a/util/grub.d/10_linux.in
+++ b/util/grub.d/10_linux.in
@@ -194,6 +194,7 @@
 machine=`uname -m`
 case "x$machine" in
     xi?86 | xx86_64) klist="/boot/vmlinuz-* /vmlinuz-* /boot/kernel-*" ;;
+    xaarch64) klist="/boot/Image-* /Image-* /boot/kernel-*" ;;
     xs390 | xs390x)  klist="/boot/image-* /boot/kernel-*" ;;
     *) klist="/boot/vmlinuz-* /boot/vmlinux-* /vmlinuz-* /vmlinux-* \
 		/boot/kernel-*" ;;
