Remove __seg_tls before first release.

Remove __seg_tls before first release.

  * config/i386/i386-c.c (ix86_target_macros): Remove __SEG_TLS.
  (ix86_register_pragmas): Remove __seg_tls.
  * config/i386/i386-protos.h (ADDR_SPACE_SEG_TLS): Remove.
  * config/i386/i386.c (ix86_print_operand_address_as): Don't handle it.
  (ix86_addr_space_subset_p, TARGET_ADDR_SPACE_SUBSET_P): Remove.
  (ix86_addr_space_convert, TARGET_ADDR_SPACE_CONVERT): Remove.
  (ix86_addr_space_debug, TARGET_ADDR_SPACE_DEBUG): Remove.
  * doc/extend.texi (__seg_tls): Remove item.
testsuite/
  * gcc.target/i386/addr-space-3.c: Remove test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233639 138bc75d-0d04-0410-961f-82ee72b054a4