gfxml2dto: Add more platform detection code
- Add the platform nae to the platform struct.
- Add parsing of legacy cpuid
- Detect SNATONO and SANTOKA (only SANTOKA Quad right now)
- Add the platform specific information to the touch callback. This was meant to define IRQ and reset GPIOs, however as it is hard to handle the fixups in the callback I changed the property binding in the ilitek driver instead.