touch: Add G&F touch drivers

• Copied touch drivers from G&F Rocko
• Includes the drivers for several touches including
  • atmel-mtx
  • AUO pixcir
  • EDT ft5x05 and ft5x06
  • EETI EXC7200 (i2c)
  • EETI EXC3000 (i2c) including 80H80
  • Himax
  • Ilitek 2118
  • Ilitek 25xx
  • SCX050000
  • SIS
• Also includes touchgpio kernel module that generalizes the GPIO handling
• Include the packagegroup-guf-touchdriver.bb
• Include a guf-kernel-module.inc include file