Revert "Avoid UB in xx_loadl/storel_32 helper functions"
Revert "Avoid UB in xx_loadl/storel_32 helper functions"

This reverts commit be0aa4ad0b1ae324d26aeec73e806ae85c16441c.

Building with gcc version 6.3.0, the intrinsic used is compiled as
"movaps", which read and write 128 bits.

BUG=aomedia:1089

Change-Id: I5df011465013297de4fbb808bae2fd3ce30589d1

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom