Reduce TF complexity.
Reduce TF complexity.

This saves 1 add and 1 shift per 2x2 group of coefficients.
On subset1 with default settings the rate goes up by 0.006% and
 PSNR drops 0.005 dB, both of which are probably in the noise.

mbebenita/daala,tdaede/daala_awcy_runs,kustom666/daala,xiph/daala,kbara/daala,kodabb/daala,tribouille/daala,kodabb/daala,nvoron23/daala,ascent12/daala,tdaede/daala_awcy_runs,ycho/daala,fluffy/daala,fluffy/daala,luctrudeau/daala,kodabb/daala,ycho/daala,HeadhunterXamd/daala,iankronquist/daala,kustom666/daala,luctrudeau/daala,HeadhunterXamd/daala,ekr/daala,ycho/daala,felipebetancur/daala,ascent12/daala,jmvalin/daala,HeadhunterXamd/daala,xiph/daala,iankronquist/daala,metajack/daala,ycho/daala,luctrudeau/daala,tdaede/daala,jmvalin/daala,kustom666/daala,kbara/daala,xiphmont/daala,xiphmont/daala,smarter/daala,fluffy/daala,nvoron23/daala,felipebetancur/daala,jmvalin/daala,felipebetancur/daala,xiph/daala,iankronquist/daala,mbebenita/daala,ascent12/daala,HeadhunterXamd/daala,ascent12/daala,vr000m/daala,mbebenita/daala,tdaede/daala,ekr/daala,smarter/daala,luctrudeau/daala,kbara/daala,KyleSiefring/daala,KyleSiefring/daala,vr000m/daala,tdaede/daala_awcy_runs,kustom666/daala,KyleSiefring/daala,metajack/daala,KyleSiefring/daala,iankronquist/daala,kodabb/daala,vr000m/daala,kustom666/daala,ascent12/daala,kbara/daala,smarter/daala,tribouille/daala,jmvalin/daala,xiph/daala,HeadhunterXamd/daala,tdaede/daala,tribouille/daala,KyleSiefring/daala,felipebetancur/daala,tribouille/daala,kodabb/daala,mbebenita/daala,xiphmont/daala,tdaede/daala_awcy_runs,nvoron23/daala,ekr/daala,jmvalin/daala,luctrudeau/daala,ycho/daala,tdaede/daala,nvoron23/daala,vr000m/daala,mbebenita/daala,vr000m/daala,iankronquist/daala,felipebetancur/daala,tribouille/daala,smarter/daala,xiphmont/daala,xiphmont/daala,xiph/daala,nvoron23/daala,metajack/daala