altos/stm: Make beeper driver support all possible tim234 configs
authorKeith Packard <keithp@keithp.com>
Sat, 13 Oct 2018 20:42:34 +0000 (13:42 -0700)
committerKeith Packard <keithp@keithp.com>
Fri, 19 Oct 2018 15:38:32 +0000 (08:38 -0700)
And update all users to be explicit about the desired config.

Signed-off-by: Keith Packard <keithp@keithp.com>

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