There is a post by Mirasol MVP here that explains how to toggle Skyriding, and what you need to do to get steady flight (the old regular flying.) In the new expansion. Which is to complete the expansion campaign (pathfinder) and reach max level.
You can still do regular flying in past expansions by using the toggle for each mount you wish to ride.
Click on the green crown to the right under the vertical slidder bar to see the post. 
Welcome back.
Edited to add, oh yay the link worked! lol Ok, click on that link. lol