c6x.h: Adjust fall through comment.

	* config/c6x/c6x.h: Adjust fall through comment.
	* config/sh/sh.c (final_prescan_insn): Likewise.
	* config/visium/visium.c (visium_expand_int_cstore): Likewise.
	(visium_expand_fp_cstore): Likewise.

From-SVN: r240539