gfxml2dto: Add NALLINO
To add teh iMX6ULL NALLINO platform some platform adjustments should be made. It was necessary to abstract the capacitive touhc GPIO-chip string, the reset pin number.
Some settings are not necessary for NALLINO so leave then NULL. This however made some null checks necessary and improves the circumstances when no configuration (i.e. there is no display configuration in the XML) is available.
Rewrite the platform Array to hold pointers and introduce the gfplatdetect driver parsing.