Cleanup watchdog driver code

This commit cleans up some unused variables causing
compile warnings as well as unused code blocks that
were disabled after finding they were causing
stability issues with the I2C buss due to IRQ
handling.

BUG=25764468

Change-Id: Ifad064581fb418bf66bc0874d8f5f4e3971f2a5a
Signed-off-by: Brian Wood <brian.j.wood@intel.com>
1 file changed