USB: Train Mascon and Master Controller emulation

[Florin9doi]

Description of Changes

Implemented emulation support for the Train Mascon and Master Controller. These represent the final two USB train controllers compatible with the PlayStation 2. An additional device, the Multi Train Controller, is also available; however, it functions by emulating either Type 2 or Train Mascon. The number of power and brake notches are configurable on the Settings page.

Rationale behind Changes

Certain titles were previously incompatible with the existing train controller implementations. This update expands support to improve overall compatibility.

Suggested Testing Steps

Compatible titles can be found at the following website: https://traincontrollerdb.marcriera.cat/software/system/index.html#ps2