Fix evmapy.py missing Y axis mappings

[lulol]

Fix #12927

[nadenislamarre]

"absbasey_positive = int(input.value) < 0" is obviously wrong (or the variable name must be changed)
let me try to reproduce and fix based on your code.
thanks.

[lulol]

Ok. Removed the absbasey_positive change from this PR if that is an issue, since I didn't investigated much further how could affect other controllers.

As stated in the associated issue, in my particular case, all the game pads and controllers I tested show (up, left).min = 0 and (down, right).max = 255 and with the current logic the up/down axis is inverted, and just seems strange the logic mismatch between axes.