rs6000.md (extzv): FAIL for SImode.

	* config/rs6000/rs6000.md (extzv): FAIL for SImode.
	(extzvsi_internal, *extzvsi_internal1, *extzvsi_internal2,
	*rotlsi3_internal7le, *rotlsi3_internal7be, *rotlsi3_internal8le,
	*rotlsi3_internal8be, *rotlsi3_internal9le, *rotlsi3_internal9be,
	*rotlsi3_internal10le, *rotlsi3_internal10be, *rotlsi3_internal11le,
	*rotlsi3_internal11be, *rotlsi3_internal12le, *rotlsi3_internal12be,
	*lshiftrt_internal1le, *lshiftrt_internal1be, *lshiftrt_internal2le,
	*lshiftrt_internal2be, *lshiftrt_internal3le, *lshiftrt_internal3be,
	*lshiftrt_internal4le, *lshiftrt_internal4be, *lshiftrt_internal5le,
	*lshiftrt_internal5be, *lshiftrt_internal5le, *lshiftrt_internal5be,
	*rotldi3_internal7le, *rotldi3_internal7be, *rotldi3_internal8le,
	*rotldi3_internal8be, *rotldi3_internal9le, *rotldi3_internal9be,
	*rotldi3_internal10le, *rotldi3_internal10be, *rotldi3_internal11le,
	*rotldi3_internal11be, *rotldi3_internal12le, *rotldi3_internal12be,
	*rotldi3_internal13le, *rotldi3_internal13be, *rotldi3_internal14le,
	*rotldi3_internal14be, *rotldi3_internal15le, *rotldi3_internal15be,
	and 30 corresponding splitters): Delete.

From-SVN: r223070