VP9 common for ARMv8 by using NEON intrinsics 04

Add vp9_convolve8_avg_neon.c
- vp9_convolve8_avg_horiz_neon
- vp9_convolve8_avg_vert_neon

Change-Id: I617971e37b02186fec5aca181f4f9622050ea2df
Signed-off-by: James Yu <james.yu@linaro.org>
5 files changed