* gas/config/tc-arm.c (do_iwmmxt_wldstbh): Don't multiply offset

	* gas/config/tc-arm.c (do_iwmmxt_wldstbh): Don't multiply offset
	by 4 here.
	(md_apply_fix3): Multiply offset by 4 here for
	BFD_RELOC_ARM_CP_OFF_IMM_S2.
	* gas/testsuite/gas/arm/arm.exp: Run iwmmxt-bad2.
	* gas/testsuite/gas/arm/iwmmxt.s: Increase offsets for wstrb and
	wstrh.
	* gas/testsuite/gas/arm/iwmmxt.d: Update expected results.
	* gas/testsuite/gas/arm/iwmmxt-bad2.s: Test wstrb, wstrh, wldrb
	and wldrh.
	* gas/testsuite/gas/arm/iwmmxt-bad2.l: Update expected error
	messages.