sse.md (*sse2_uavgv16qi3): Merge with *avx_uavgv16qi3.

	* config/i386/sse.md (*sse2_uavgv16qi3): Merge with *avx_uavgv16qi3.
	(*sse2_uavgv8hi3): Merge with *avx_uavgv8hi3.
	(sse2_psadbw): Merge with *avx_psadbw.
	(ssse3_phaddwv8hi3): Merge with *avx_phaddwv8hi3.
	(ssse3_phadddv4si3): Merge with *avx_phadddv4si3.
	(ssse3_phaddswv8hi3): Merge with *avx_phaddswv8hi3.
	(ssse3_phsubwv8hi3): Merge with *avx_phsubwv8hi3.
	(ssse3_phsubdv4si3): Merge with *avx_phsubdv4si3.
	(ssse3_phsubswv8hi3): Merge with *avx_phsubswv8hi3.
	(ssse3_pmaddubsw128): Merge with *avx_pmaddubsw128.
	(*ssse3_pmulhrswv8hi3): Merge with *avx_pmulhrswv8hi3.
	(ssse3_pshufbv16qi3): Merge with *avx_pshufbv16qi3.
	(ssse3_psign<mode>3): Merge with *avx_psign<mode>3.
	(ssse3_palignrti): Merge with *avx_palignrti.

From-SVN: r172403