Short answer: you don't..
Just add a new event for the touch controls you want..
Using an "or"-block would probably be too much of a hassle here, because the touch event probably needs conditions to work as expected and this would then conflict with the keyboard event..
You could add the browser object to check if on mobile and put the controls in seperate groups and activate/de-activate when needed, but the way you explain your controls, this wouldn't really help except for making your event-sheet more readable..