bfd: use default coff_write_object_contents for XCOFF64

[CHIGOT, CLEMENT]

Hi, 

There is no needed for XCOFF64 to have its own write_object_contents.

ChangeLog:
2020-10-26  Clément Chigot  <clement.chigot@atos.net>

        * bfd/coff64-rs6000.c (xcoff64_write_object_contents): Remove.
        * bfd/coffcode.h (coff_write_object_contents): Add
        bfd_mach_ppc_620 support for o_cputype field.  Avoid creating
        an empty a.out header for XCOFF64.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0002-bfd-use-default-coff_write_object_contents-for-XCOFF.patch
Type: application/octet-stream
Size: 12279 bytes
Desc: 0002-bfd-use-default-coff_write_object_contents-for-XCOFF.patch
URL: <https://sourceware.org/pipermail/binutils/attachments/20210216/33f4b05a/attachment-0001.obj>