Revert commit 240d6706c6a2

	PR 28592
	PR 15994
	PR 15935
	* dwarf2.c (lookup_address_in_line_info_table): Return bool rather
	than a range.
	(comp_unit_find_nearest_line): Likewise.  Return true if function
	info found without line info.
	(_bfd_dwarf2_find_nearest_line): Revert range handling code.