Change-Id: I3ea3e77364879928bd916f2b0a7838073ade5975

change prefix vp9_ to vpx_ for non codec specific functions and data
structures.

Change-Id: I97c7e6422eceea99212b93f4942bc2187763a07c

Replace vp9_ in names to vpx_ as they are not codec specific.

Change-Id: I2e583aa63dee769353ada4b42417aa15c4074ebb

Change-Id: I0426126d0a65f13f9250983e44cc366b1b1a9c4a

Change-Id: Ib1cb1fbe92a39ff5312cee069559be6d3ea458d0

This commit replaces an integer divide with a table-lookup. It is
to improve decoding speed, and at the same time, to reduce possible
complications with a bug in AMD Family 12h processors:

"665 Integer Divide Instruction May Cause Unpredictable Behavior"

Change-Id: I678b707a538798a923850bac467e66e847e6def7

- place extern within the macro
- use in the header only

Change-Id: I4274b345d8af9ef329c0eb9553a3ddaad70d1d26

Change-Id: Ib26fbfef3505299f754e5af6c437a85d7746fc28

Moving vp9_norm probability table from vp9_entropy.c to vp9_prob.c

Change-Id: Ie757b73860c6f43130790c332b292e2a1a81b788