power64.csv: more instruction forms
power64.csv: more instruction forms

The power64spec program is missing some single precision
floating point instructions from page 144 to page 150 on
ISA v2.07.

LGTM=rsc
R=rsc
https://codereview.appspot.com/126290043

GreatStuff660/rsc.power64,minux/power64,achenge07/rsc.power64,arthurdick/rsc.power64,taolu0615/rsc.power64,francoishill/rsc.power64