watchdog: add driver for Cortina Gemini watchdog

This add support for the Cortina systems Gemini (SL3516)
SoC watchdog.

I have tried to use all the right new kernel interfaces
and tested with busybox' "watchdog" command both to kick
and get timeouts and reboots.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
3 files changed