reload.h, [...]: Revert March 15 change.

reload.h, [...]: Revert March 15 change.

	* reload.h, reload1.c (eliminate_regs), caller-save.c, dbxout.c,
	dwarfout.c, dwarf2out.c, reload.c, sdbout.c: Revert March 15 change.
	* reload.c (push_reload): If WORD_REGISTER_OPERATIONS, reload the
	SUBREG_REG if the word count is unchanged.
	* reload1.c (eliminate_regs) [case SET]: If W_R_O, preserve
	subregs of identical word size for push_reload.

From-SVN: r17105