Can one inning really be the fix-all for OU softball? That sounds crazy to say for the back-to-back-to-back national champions but stay with me here. Entering the bottom of the sixth inning against Oklahoma State on Sunday, OU was shook. Still fighting, for sure, but definitely not the super power the softball world has come to know. A 2-2 game turned into an 8-2 rout for the Sooners. A six-spot to remember? The confidence was back. The mojo, too? That’s what we’re about to find out as OU heads to the Big 12 Tournament this week in Oklahoma City. No. 2-seeded Sooners take on No. 7 Kansas at 1:…