[ARC] Refurbish emitting DWARF2 related information when expanding epilogue.

[ARC] Refurbish emitting DWARF2 related information when expanding epilogue.

gcc/
2015-12-14  Claudiu Zissulescu  <claziss@synopsys.com>
	    Andrew Burgess  <andrew.burgess@embecosm.com>

	* config/arc/arc.c (frame_move): Set frame related flag.
	(arc_save_restore): Emit epilogue related DWARF2 information.
	(arc_expand_epilogue): Likewise.
	* config/arc/arc.opt (mno-epilogue-cfi): Remove.
	(mepilogue-cfi): Likewise.
	* doc/invoke.texi: Remove -m[no]-epilogue-cfi documentation.

Co-Authored-By: Andrew Burgess <andrew.burgess@embecosm.com>
From-SVN: r231608