Limit registers when LRNFillScale runs on TK1.
Limit registers when LRNFillScale runs on TK1.

Fix for torch@cunn#271, to make openface works on Jetson TK1.
apaszke/cunn,andreaskoepf/cunn,colesbury/cunn,apaszke/cunn,apaszke/cunn,colesbury/cunn,colesbury/cunn,andreaskoepf/cunn