QuantizeBlock SSE2 Optimization:
QuantizeBlock SSE2 Optimization:

Another store to load forward block was detected coming from the function
FTransform.
FTransform save the output data 4 times 8 bytes each. when this data is
later being loaded by the QuantizeBlock function in one chunk of 16 bytes
that caused a store to load forward block.
The fix was done in the FTransform function where each two consecutive 8 bytes
were merged into one 16 bytes register and saved into the memory.
This fix gives ~21% function level gain and 1.6% user level gain.

Change-Id: Idc27c307d5083f3ebe206d3ca19059e5bd465992

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