ToDo list (incomplete, unordered)
- add compile as module support
- - fix clk usage
- should not be using clk_get_sys(), but clk_get(&pdev->dev, conn)
- where conn is either NULL if the device only has one clock, or
- the device specific name if it has multiple clocks.
- move half of the nvec init stuff to i2c-tegra.c
- move event handling to nvec_events
- finish suspend/resume support