Rename *_partition_map to part_*
* partmap/acorn.c (grub_acorn_partition_map): Set name to 'part_acorn'.
* partmap/amiga.c (grub_amiga_partition_map): Set name to 'part_amiga'.
* partmap/apple.c (grub_apple_partition_map): Set name to 'part_apple'.
* partmap/gpt.c (grub_gpt_partition_map): Set name to 'part_gpt'.
All users updated.
* partmap/msdos.c (grub_msdos_partition_map): Set name to 'part_msdos'.
All users updated.
* partmap/sun.c (grub_sun_partition_map): Set name to 'part_sun'.
* util/grub-probe.c (probe_partmap): Don't transform partition name
to get module name.
* kernel/disk.c (grub_disk_read): Use void pointer for the
buffer.
(grub_disk_write): Use const void pointer for the buffer.
Adjust all callers. Remove unnecessary casts.
Parttool autoloading and improvements
* Makefile.in (pkglib_DATA): add parttool.lst
(parttool.lst): new target
* genmk.rb: generate parttool-*
(CLEANFILES): add #{parttool}
(PARTTOOLFILES): new variable
* genparttoollist.sh: new file
* parttool/pcpart.c (grub_pcpart_boot): more feedback
(grub_pcpart_type): likewise
* commands/parttool.c (helpmsg): new variable
(grub_cmd_parttool): output help if not enough arguments are supplied
autoload modules
(GRUB_MOD_INIT(parttool)): use helpmsg
