hppa: Fix handling of relocations that apply to data

Commit d125f967 introduced a bug
in handling relocations for data.  The R_PARISC_DIR32 relocation
operates on 32-bit data and not instructions.  The HOWTO table
needs to be used to determine the format of relocations that apply
to data.  The R_PARISC_SEGBASE relocation is another special case
as it only changes segment base.

This was noticed in Debian cmor package build.

2024-07-14  John David Anglin  <danglin@gcc.gnu.org>

bfd/ChangeLog:

	* elf32-hppa.c (final_link_relocate): Use HOWTO table to
	determine reload format for relocations that apply to data.