Refactor tx_size to pixel number mapping in reconintra.c
Refactor tx_size to pixel number mapping in reconintra.c

Change-Id: Ib763971bf59859ffc457690b2f084880dc42943f

luctrudeau/aom,luctrudeau/aom,luctrudeau/aom,GrokImageCompression/aom,GrokImageCompression/aom,luctrudeau/aom,GrokImageCompression/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,smarter/aom,mbebenita/aom,smarter/aom,smarter/aom,mbebenita/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,mbebenita/aom,smarter/aom,GrokImageCompression/aom,mbebenita/aom,smarter/aom,mbebenita/aom,mbebenita/aom