tree ff7b4987c072438a2d686c85a6af314a2ab44fe2
parent 83467409491c3d7f948e5c7f9456517fe8cf9ae5
author Matt Spinler <spinler@us.ibm.com> 1699468907 -0600
committer Matt Spinler <spinler@us.ibm.com> 1699468907 -0600

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