Remove Solaris/PowerPC support

Remove Solaris/PowerPC support

Solaris/PowerPC was a shortlived Solaris port with limited hardware
support.  It was released with Solaris 2.5.1 back in 1996, with support
removed again only a year later in Solaris 2.6.  Since this is long
obsolete, this patch removes the remains of the support.

Tested by a cross to ppc-unknown-linux-gnu to ascertain the build didn't
get broken.

2025-09-15  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	bfd:
	* config.bfd <powerpc-*-solaris2*>: Remove.

	gas:
	* NEWS: Mention Solaris/PowerPC removal.

	* configure.ac <ppc-*-solaris*>: Remove.
	* configure: Regenerate.
	* configure.in: Regenerate.
	* configure.tgt <ppc-*-solaris*>: Remove.

	* config/tc-ppc.c (ppc_solaris_comment_chars): Remove.
	(ppc_eabi_comment_chars): Remove.
	(SOLARIS_P): Remove.
	(msolaris): Remove.
	(md_parse_option): Remove "solaris", "no-solaris" hangling.
	(md_show_usage): Likewise.
	(md_begin): Remove msolaris handling.
	* config/tc-ppc.h (ppc_comment_chars): Fix declaration.
	* stabs.c (s_stab_generic) [TC_PPC && OBJ_ELF]: Remove 4-arg
	.stabd support.

	* doc/as.texi (Overview, Target PowerPC options): Remove
	-msolaris, -mno-solaris.
	* doc/c-ppc.texi (PowerPC-Opts): Remove -msolaris, -mno-solaris.
	(PowerPC-Chars): Remove ! as line comment character.

	ld:
	* configure.tgt <powerpc*-*-solaris*>: Remove.