Add unbind/bind around fan speed i2csets

When the max31785 device driver becomes available,
we'll need to unbind it before using i2sets to talk
to the chip.

Change-Id: I25967d753ca81b899880a160f3ea4a022be48e77
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed