control:Bonnell: Increase deviation value

Increase Bonnell's lower deviation setting from 18% to 22%.  This is
necessary because the lower end for the outlet rotors was raised by an
earlier commit that modified the factor and offset values so that a
different fan type can be supported.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: Ie68e6f2a60109b566328ab2bac1cdeb029f255b2
1 file changed