PowerPC HOWTOs

PowerPC HOWTOs

These take up far too many lines in the files.  This patch introduces
a replacement for the HOWTO macro that simplifies the relow howto
initialization.  Apart from the two relocs mentioned in the ChangeLog,
no relocation howto is changed.

	* elf64-ppc.c (HOW): Define.
	(ONES): Delete.
	(ppc64_elf_howto_raw): Use HOW to initialize entries.
	* elf32-ppc.c (HOW): Define.
	(ppc_elf_howto_raw): Use HOW to initialize entries, updating
	R_PPC_VLE_REL15 and R_PPC_VLE_REL24 to use bitpos=0.