I don't recall seeing Mickey waffles at the kid's station in Pepper Market, but I don't often go to breakfast. I agree the buffet would be a waste if you just want a quick bite.
There is the grab-n-go Rix market with breakfast-lunch-dinner items, no waffles here though. For breakfast cereal, muffins & pastries, egg croissant sandwiches, fruit cups, etc.
Best bet for Mickey waffles is a la carte breakfast at a deluxe resort or in the parks, esp. character breakfasts but those are all full buffets too.