samus: Start fans at 1000 RPM
samus: Start fans at 1000 RPM

After receiving more info from the manufacturer, it appears that
since we're using closed-loop feedback to drive the fan we can
turn it at whatever speed seems to work.

While we're bikeshedding over the startup noise, let's put the
start/min speed back to 1000RPM to help distinguish the startup
chirp from the fan-is-running-now noise.

BUG=chrome-os-partner:32757
BRANCH=ToT,Samus
TEST=make buildall -j

Watch fan speeds while doing things. It still makes noise, but it's
quieter.

Change-Id: I5c21bf9021e4110f31c6dded78852347c4eb6119
Signed-off-by: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/234755
Reviewed-by: Sameer Nanda <3daf6939ed4518939423e49b8a1025b098597787@chromium.org>
Reviewed-by: Eric Caruso <b4dfd424537681137c06263971140211e84cb3c6@chromium.org>

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