Renaming vp9_short_idct10_16x16 to vp9_short_idct16x16_10.

Making function name consistent with vp9_short_idct16x16 and
vp9_short_idct16x16_1.

Change-Id: I70e54be9e6b9a1dddab0de470686591e96d05517
7 files changed