Borrow transition functions from fdct.h nee vpx_quantize_b_sse2 BUG=webm:1304 Change-Id: I9c88c3eec3ff8bb461411d98c26c3c236ea28ef1
These can be used in the vp9 fdct as well. Change-Id: I4f3875e0cba1b8cad209c3a0581e121deba7675e