* cpu-h8300.c (h8300_scan, compatible): Prototype.

    * cpu-h8300.c (h8300_scan, compatible): Prototype.
        (h8300_scan): Handle architecture:machine encodings typically
        found in linker scripts.
        * elf.c (prep_headers): Do not try to do H8 machine recognition
        here.
        * elf32-h8300.c:  Add some missing prototypes.
        (elf32_h8_mach, elf32_h8_final_write_processing): New functions.
        (elf32_h8_object_p): Similarly.