Support limited setcc for H8

Support limited setcc for H8

gcc/

	* config/h8300/bitfield.md (cstore<mode>4): Remove expander.
	* config/h8300/h8300.c (h8300_expand_branch): Remove function.
	* config/h8300/h8300-protos.h (h8300_expadn_branch): Remove prototype.
	* config/h8300/h8300.md (eqne): New code iterator.
	(geultu, geultu_to_c): Similarly.
	* config/h8300/testcompare.md (cstore<mode>4): Dummy expander.
	(store_c_<mode>, store_c_i_<mode>): New define_insn_and_splits
	(cmp<mode>_c): New pattern