Fix: SIMD buffer alignment for BIF buffer
To make SIMD align at 128bit, BIF buffer should start at 12th byte. However, when Tu boundary is the same as VB in Chroma, it won't start at the 12th byte consequently it will crash.
To make SIMD align at 128bit, BIF buffer should start at 12th byte. However, when Tu boundary is the same as VB in Chroma, it won't start at the 12th byte consequently it will crash.