[MIPS] VP8 optimizations for MIPS

For Little-endian only

Change-Id: I3c054379c49efd39658756bf72786de6699879c1
Signed-Off-By: Bhanu Chetlapalli <bhanu@mips.com>
Signed-Off-By: Raghu Gandham <raghu@mips.com>
23 files changed