drivers: input: gt911: Add support for multitouch events

The gt911 can recognize up to 5 touch points at a time.
Add code to support these multi-touch events.

Signed-off-by: Farah Fliss <farah.fliss@nxp.com>
Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>
2 files changed