Add vp9_quantize_fp_nz_c() -- 2
Add vp9_quantize_fp_nz_c() -- 2

This c version uses the shortcuts found in the x86
vp9_quantize_fp functions.

The test was updated to use the correct quant/round range.

Change-Id: Ie5871f710d9eb39047d8d9f48b907c0633e1f830

ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx