Fix enum setting used as requirement

[grorp]

This worked because "auto" resulted in is_yes returning false, so touch_controls = auto fulfilled the touch_controls = false requirement, but that's not something we should rely on.

keyboard_mouse and touchscreen are the proper "special" requirements that should be used instead of directly using the touch_controls setting as a requirement.

How to test

touch_controls = auto: "Controls" button shown in settings
touch_controls = false: "Controls" button shown in settings
touch_controls = true: "Controls" button hidden in settings

There must be no warnings.

[sfan5]

lgtm