sparc: Remove HAVE_AS_SPARC_UA_PCREL and HAVE_AS_SPARC_UA_PCREL_HIDDEN

sparc: Remove HAVE_AS_SPARC_UA_PCREL and HAVE_AS_SPARC_UA_PCREL_HIDDEN

The SPARC backend currently has workarounds for two bugs in old versions
of the assembler and linker.  However, I find both
HAVE_AS_SPARC_UA_PCREL and HAVE_AS_SPARC_UA_PCREL_HIDDEN are always
defined as 1 on both Solaris/SPARC and Linux/sparc64.

I've checked all combinations of the assemblers supported on SPARC: the
Solaris 11.4 FCS as and ld, current Solaris as and ld, gas and gld 2.30
and 2.45.  The tests work on all of those, so the workarounds can be
removed.

Bootstrapped on sparc-sun-solaris2.11 (as and gas) and
sparc64-unknown-linux-gnu.

2026-01-13  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	gcc:
	* configure.ac (gcc_cv_as_sparc_ua_pcrel): Remove.
	(gcc_cv_as_sparc_ua_pcrel_hidden): Likewise.
	* configure: Regenerate.
	* config.in: Regenerate.

	* config/sparc/sparc.h (ASM_PREFERRED_EH_DATA_FORMAT): Remove
	!HAVE_AS_SPARC_UA_PCREL, !HAVE_AS_SPARC_UA_PCREL_HIDDEN support.
	* config/sparc/sol2.h (ASM_PREFERRED_EH_DATA_FORMAT): Remove.
	* config/sparc/sparc.cc (TARGET_ASM_OUTPUT_DWARF_DTPREL): Remove
	HAVE_AS_SPARC_UA_PCREL guard.