Input updates for v6.9-rc0

- a new driver for Goodix Berlin I2C and SPI touch controllers

- support for IQS7222D v1.1 and v1.2 in iqs7222 driver

- support for IST3032C and IST3038B parts in Imagis touchscreen driver

- support for touch keys for Imagis touchscreen controllers

- support for Snakebyte GAMEPADs in xpad driver

- various cleanups and conversions to yaml for device tree bindings

- assorted fixes and cleanups

- old Synaptics navpoint driver has been removed since the only board
  that used it (HP iPAQ hx4700) was removed a while ago.
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