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>
