control: Add power on/offs to flight recorder
Add entries for when the power state changes to the flight recorder.
This can help provide context to other entries that may occur due to the
power on/off, as well as give a history of the state changes without
needing to search journal output, if there is any.
Tested:
```
"Nov 08 18:04:53.922812: pcie_card_floors-58: Found 0 hot cards, 1 with temp sensors, 0 uninteresting",
"Nov 08 18:05:12.104198: power: Power off",
"Nov 08 18:05:24.830231: pcie_card_floors-58: Found 0 hot cards, 0 with temp sensors, 0 uninteresting",
"Nov 08 18:08:24.172855: power: Power On",
```
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I7605401c1dac5162903e13ae8ad71de2928ddd13
1 file changed