Modulize the partition map support and add support for the amiga
partition map.
* commands/ls.c: Include <grub/partition.h> instead of
<grub/machine/partition.h>.
* kern/disk.c: Likewise.
* kern/rescue.c: Likewise.
* loader/i386/pc/chainloader.c: Likewise.
* normal/cmdline.c: Likewise.
* kern/powerpc/ieee1275/init.c: Likewise.
(grub_machine_init): Call `grub_pc_partition_map_init',
`grub_amiga_partition_map_init' and
`grub_apple_partition_map_init'.
* conf/i386-pc.rmk (kernel_img_SOURCES): Remove
`disk/i386/pc/partition.c'. Add `kern/partition.c'.
(kernel_img_HEADERS): Remove `machine/partition.h'. Add
`partition.h' and `pc_partition.h'.
(grub_setup_SOURCES): Remove
`disk/i386/pc/partition.c'. Add `kern/partition.c',
`partmap/amiga.c', `partmap/apple.c' and `partmap/pc.c'.
(grub_emu_SOURCES): Likewise.
(pkgdata_MODULES): Add `amiga.mod', `apple.mod' and `pc.mod'.
(amiga_mod_SOURCES, amiga_mod_CFLAGS, apple_mod_SOURCES)
(apple_mod_CFLAGS, pc_mod_SOURCES, pc_mod_CFLAGS): New variables.
* conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Remove
`disk/powerpc/ieee1275/partition.c'. Add `kern/partition.c',
`partmap/amiga.c', `partmap/apple.c' and `partmap/pc.c'.
(grubof_SOURCES): Likewise.
* disk/i386/pc/partition.c: File removed.
* disk/powerpc/ieee1275/partition.c: Likewise.
* include/grub/powerpc/ieee1275/partition.h: Likewise.
* include/grub/i386/pc/partition.h: Likewise.
* kern/partition.c: New file.
* partmap/amiga.c: Likewise.
* partmap/apple.c: Likewise.
* partmap/pc.c: Likewise.
* include/grub/partition.h: Likewise..
* include/grub/pc_partition.h: Likewise.
* util/grub-emu.c: Include <grub/partition.h> instead of
<grub/machine/partition.h>.
(main): Call `grub_pc_partition_map_init',
`grub_amiga_partition_map_init' and
`grub_apple_partition_map_init' and deinitialize afterwards.
* util/i386/pc/biosdisk.c: Include `#include
<grub/partition.h>' and `include <grub/pc_partition.h>' instead of
`<grub/machine/partition.h>'.
* util/i386/pc/grub-setup.c: Likewise.
* util/i386/pc/biosdisk.c: Likewise.
(grub_util_biosdisk_get_grub_dev): Only access the PC specific
partition information in case of a PC partition.
* util/i386/pc/grub-setup.c: Include `#include
<grub/partition.h>' and `include <grub/pc_partition.h>' instead of
`<grub/machine/partition.h>'.
(setup): Only access the PC specific partition information in case
of a PC partition.
