* config/mips/linux-unwind.h (mips_fallback_frame_state): Rewrite
	return address calculation.  Substitute DWARF_ALT_FRAME_RETURN_COLUMN
	for SIGNAL_UNWIND_RETURN_COLUMN.
	* config/mips/mips.h (SIGNAL_UNWIND_RETURN_COLUMN): Remove.
	(DWARF_FRAME_REGNUM): Rewrite.
	(DWARF_ALT_FRAME_RETURN_COLUMN) Define.

From-SVN: r126555