drivers: gpio: Add Davinci gpio controller support

Davinci gpio controller support to add various soc gpio
support (J721E, AM654).

TRM for J721e https://www.ti.com/lit/zip/spruil1
File: spruil1c.pdf
GPIO: section 12.1.2

BeagleBone AI_64 https://beagleboard.org/ai-64



Signed-off-by: Prashanth S <slpp95prashanth@yahoo.com>