Fix decoder mismatch in sub-pixel AVX2 intrinsic filters
Fix decoder mismatch in sub-pixel AVX2 intrinsic filters

The subpixel SSSE3 was fixed in this patch:
https://gerrit.chromium.org/gerrit/#/c/70283/
So the equivalent AVX2 is fixed accordingly.

Change-Id: Ieebbc1949c99d34b12b8b47692df71aca5001f3a

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