hppa64: Add code to intialize __data_seg section symbol

2025-10-30  John David Anglin  <danglin@gcc.gnu.org>

bfd/ChangeLog:

	* elf64-hppa.c (struct elf64_hppa_link_hash_table): Add
	data_segment field.
	(allocate_global_data_opd): Move code to initialize text
	segment section symbol to elf64_hppa_late_size_sections.
	(elf64_hppa_late_size_sections): Add code to setup
	__data_seg section symbol.