PHOENIX — It wasn’t perfect by any means, but a 6-1 victory over the Diamondbacks and two losses that occurred elsewhere made for a good Sunday for the Padres. Yu Darvish worked through six innings for the 21st consecutive start, and for the seventh time this season did so without allowing a run to become the Padres’ first 15-game winner since Jake Peavy won 19 games in 2007. Padres hitters fared much better against Ryne Nelson than they had in the right-hander’s major league debut two weeks earlier. Their aggressiveness at the plate Sunday was highlighted by home runs by Manny Machado and Jua…