* util/grub-install.in: Use mkdir -p to create grub directory.

* util/i386/efi/grub-install.in: Likewise.
	* util/ieee1275/grub-install.in: Likewise.

util/i386/efi/grub-install.in

@@ -145,8 +145,7 @@ else
 fi
 
 # Create the GRUB directory if it is not present.
-test -d "$bootdir" || mkdir "$bootdir" || exit 1
-test -d "$grubdir" || mkdir "$grubdir" || exit 1
+mkdir -p "$grubdir" || exit 1
 
 # If --recheck is specified, remove the device map, if present.
 if test $recheck = yes; then