Fix input bugs on Steam Deck

[kageurufu]

Borrowed from https://github.com/shiiion/dolphin/pull/159

Fixes bugs noted in https://github.com/shiiion/dolphin/issues/158

Based on changes from https://github.com/dolphin-emu/dolphin/commit/c3b8aa1fe582d9798939a1975e559ad4a69c3f02

[XargonWan]

Unfortunately now we are running on a non-merged PR of primehack, and considering that this fix should ve tested there is no way we can implement it in 0.8.4b as it's an hotfix. We will merge everything in 0.9.0b when at least one of the two PRs is approved.

Thanks for the contribution, keeping it on hold for now.

[Fing3rSalad]

I just updated retrodeck to the latest version, and the inputs after closing primehack are still messed up.

[XargonWan]

The structure has changed as Primehack has been outsourced, if we need to patch, we need to patch there, but first better to check if the newest update (if contains the needed fixes for differentiating Primehack from Dolphin) is already fixed.