Add CRIS atomic patterns for 1, 2, and 4 bytes.

Add CRIS atomic patterns for 1, 2, and 4 bytes.

	* config/cris/cris.c (cris_emit_trap_for_misalignment): New function.
	* config/cris/cris-protos.h: Declare it.
	* config/cris/cris.h [!TARGET_DEFAULT, TARGET_CPU_DEFAULT == 32]
	(TARGET_DEFAULT): Add alignment by 32.
	[!TARGET_DEFAULT, TARGET_CPU_DEFAULT == 10] (TARGET_DEFAULT): New
	case, as TARGET_CPU_DEFAULT == 0 but with alignment as for
	TARGET_CPU_DEFAULT == 32.
	(TARGET_TRAP_UNALIGNED_ATOMIC): New macro.
	* config/cris/cris.md: Include sync.md.  Avoid allocating specific
	numbers by replacing the define_constants for all UNSPECs with the
	equivalent define_c_enum construct.
	* config/cris/cris.opt (mtrap-unaligned-atomic): New option.
	* config/cris/sync.md: New file.

From-SVN: r188096