Harmonize ieee1275's grub_available_iterate() with the generic

    Harmonize ieee1275's grub_available_iterate() with the generic
        grub_machine_mmap_iterate() interface (fixes a recently-introduced
        build problem on i386-ieee1275):
        * kern/ieee1275/openfw.c (grub_available_iterate): Moved from here ...
        * kern/ieee1275/mmap.c (grub_machine_mmap_iterate): ... here.  Add third
        parameter `type'.  Update all users of this function.
        * conf/i386-ieee1275.rmk (kernel_elf_SOURCES): Add
        `kern/ieee1275/mmap.c'.
        * kern/ieee1275/init.c
        * include/grub/ieee1275/ieee1275.h (grub_available_iterate): Replace
        with ...
        (grub_machine_mmap_iterate): ... this.
        * include/grub/i386/pc/memory.h (grub_machine_mmap_iterate): Change
        return type to `grub_err_t'.  Update all implementations of this
        function prototype.
        * include/grub/i386/coreboot/memory.h (grub_machine_mmap_iterate):
        Likewise.

git-svn-id: svn://svn.savannah.gnu.org/grub/trunk/grub2@1924 d0de0278-0dc1-4c01-8a07-af38b3205e46