* dwarf2read.c (offreg, basereg, isderef, frame_base_reg)

	* dwarf2read.c (offreg, basereg, isderef, frame_base_reg)
	(frame_base_offset): Delete.
	(read_func_scope): Delete call to decode_locdesc.
	(decode_locdesc): Update comments.  Don't set the removed variables.
	Complain for DW_OP_reg* not at the end.  Remove DW_OP_breg* and
	DW_OP_fbreg support.