[ARM] Do not expand movmisalign pattern if not in 32-bit mode

[ARM] Do not expand movmisalign pattern if not in 32-bit mode

	* config/arm/arm.c (arm_option_override): Require TARGET_32BIT
	for unaligned_access.
	* config/arm/arm.md (unaligned_loadsi): Remove redundant TARGET_32BIT
	from matching condition.
	(unaligned_loadhis): Likewise.
	(unaligned_loadhiu): Likewise.
	(unaligned_storesi): Likewise.
	(unaligned_storehi): Likewise.

	* gcc.target/arm/armv6-unaligned-load-ice.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230664 138bc75d-0d04-0410-961f-82ee72b054a4