* ldexp.c (fold_name <LOADADDR>): Use the lma.

	* ldexp.c (fold_name <LOADADDR>): Use the lma.
	* ldlang.h (lang_memory_region_type): Delete old_length.  Add
	last_os.
	* ldlang.c (lang_memory_region_lookup): Init new field.
	(lang_reset_memory_regions): Reset new field.
	(lang_insert_orphan): Don't set load_base.
	(lang_leave_overlay): Likewise.
	(lang_size_sections_1): Delete unnecessary code setting lma_region
	to region.  Correct lma region check.
	(lang_do_assignments_1): Rename output_section_statement parm
	to current_os.  Set lma from previous section in region.