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Capless mode was mistakingly enabled, with 500Ω on VRIO to
disable the audio, which most likely cause the original
"issue" of speakers playback switching off and on when on
full volume. Fix that. Also set impedance on VRIO to 20kΩ.
Discharge HP caps on init to cause less pop.
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Disabling DAC caused an audible pop and would stop the clock, causing
any program writing to /dev/audio to halt until DAC would be enabled
again. Use "digital soft mute" instead - no clock stopping, nor pops.
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Aux/imx8pm and aux/wm8960 had pretty cryptic names and it made
more sense to use a reform/pm and reform/audio naming, accordingly.
Instead of having special mount points /mnt/pm and /mnt/wm8960,
/dev is used directly, removing the need to do any manual work -
stats(1) will continue showing the CPU temperature, and zuke(1)
will still be able to control the volume, etc.
Brightness controls were changed to a better interface -
/dev/light, where each line contains a "a_thing its_light_value".
This way more parts can be controlled. Right now it's only "lcd",
but later it might be "kbd" and "trackball" as well.
Example of lib/profile:
reform/audio
echo master 80 > /dev/volume
reform/pm
echo lcd 100 > /dev/light
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