Using local variable for token_cache.

We use local variable for token_cache in the decoder.

Change-Id: I032763fa7894313cffe73e3f14863ae1d0527665
AVX2 SAD Optimization:

2 functions were optimized for avx2 by using full 256 bit register
In order to handle 32 elements in parallel instead of only 16 in parallel:
1. vp9_sad32x32x4d
2. vp9_sad64x64x4d

The function level gain is 66% and the user level gain is ~1%.

Change-Id: I4efbb3bc7d8bc03b64b6c98f5cd5c4a9dd3212cb
Removing unused members from VP9D_CONFIG struct.

Change-Id: I83a201ab4dcf2f00131f2030f382c6dbfcb39d7e
General cleanup in vp9_decoder.{h, c}.

Change-Id: I68819558a9c5ac6ea85fe62260712af6f4cc46b7
Making c++ compiler happier.

Change-Id: Ie224e968589bdb0774dc112e6f6df56cc0447465
Adding get_buf_from_mv() function.

Change-Id: I21aff45546778b8393e2edf2d810448dec1f4cdb
Cleaning up vp9_loopfilter.c.

Change-Id: I7c7cf7d3c7b00d1c74ffa8aa8fb8d78a0e48326f
[svc] Add min/max q and min/max bitrate in svc test app

Change-Id: I67ea45119f23659279d24aa67eb823c751ac86fc
vp9_block.h static reconverted to inline

Change-Id: I0e7d2815839d8a64250116a5486570d03659a4c0
Change back the scaling calculation.

Let the calculation to be compatible with Google's HW implementation.

Change-Id: I22e179888cdb0419e230351c0a47661b37051fef
refactor reset_skip_txfm_size and elimate a lot of code

Change-Id: Id70bd0ff8836c28d9c8653e018e071ca9fb06610
Merge "Cleaning up vp9_loopfilter.c."
vp9_onyx_int.h convert header statics to inline

Change-Id: I7872b726511887494107466a946e2b34e3d74045
Merge "Removing unused members from VP9D_CONFIG struct."
Fix to a static warning.

Change-Id: I398decf319c8f4d1b3abe1f276e009840e61b684
vp9_variance.h header static version converted to global

Change-Id: I8d02cdb5e7fef02b8c95413dfd239fa51a8c7777
vp9_write_bit_buffer.h header statics converted to globals

Change-Id: I12c29a630da1fbc5508f11b61d182f9b527b3a35
Merge "AVX2 SAD Optimization:"
Merge "[svc] Add min/max q and min/max bitrate in svc test app"
Adding init_rate_control() function + cleanup.

Change-Id: I49b0937a8dd3520f20435a4817a408a094ab1679