udev: Fix 8BitDo SN30 Pro+ Bluetooth X button mappings

[RobLoach]

@bagelbyheart @Sanaki Something up with this config? Both are on latest firmware and on Xinput mode? I'm unable to test as I don't have a SN30 Pro+, nor bluetooth

Reverts #939

[bagelbyheart]

I'll be checking this shortly to verify. If this is the case, lets add a comment to the top of the file calling out the firmware version.

[bagelbyheart]

Started on firmawre v3.02. My lakka install still has the old mapping.

input_b_btn = "0"
input_y_btn = "2"
input_a_btn = "1"
input_x_btn = "3"

Confirmed still acting up. If I test the control mapping within Valkyrie Profile Cross and Circle are swapped as are Triangle and Square.

I then updated to firmware v6.01 and tested again. I still see the swap between Cross/Circle and Triangle/Square.

@Sanaki, is it possible that you have a profile applied via the 8BitDo Ultimate software? Mine is set to default and basically demonstrates the same thing I'm seeing, in the software B=A and vice versa. I've attached a screenshot of my setup post upgrade.

[Sanaki]

I have never opened the ultimate software because it's incompatible with Linux, so there's no way I could have applied such a profile. Check against the gamepad tester in a chromium based browser, see what behavior you see there.
https://hardwaretester.com/gamepad

This is what I see when holding down the bottom face button (A by xbox, B by retropad/Nintendo)

[RobLoach]

Thanks for the investigation here, both of you!