Replace hard coded numbers with TX_SIZES macro
Replace hard coded numbers with TX_SIZES macro

Replaces a couple of hard coded numbers with TX_SIZES macro
in common/reconiontra.c

Change-Id: I8a2a53ca16bc3ab51409cec340bea55292ff2dee

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