Linfeng Zhang authored Jun 06, 2016 and James Zern committed Jun 08, 2016

Cherry-pick ad0646cb Slow pshufb removal in 3 intra prediction functions.

Replaced aom_d45_predictor_4x4_ssse3(), aom_d45_predictor_8x8_ssse3()
and aom_d207_predictor_4x4_ssse3() with
created aom_d45_predictor_4x4_sse2(), aom_d45_predictor_8x8_sse2()
and aom_d207_predictor_4x4_sse2() respectively.
It's mostly neutral or slightly worse than ssse3 in good cases and
better than ssse3 in the bad cases (but still worse than using the mmx
regs).

Change-Id: I40ef101cd8b2f20eaa3f0648536bd227c7ae9722