natsemi: Improve diagnostics for DspCfg workaround

The natsemi driver has a workaround for broken hardware which resets itself
from time to time.  There is a diagnostic message for this workaround but
it is not printed by default, making the driver behavior more obscure than
it needs to be.  Make the message be displayed by default.

Signed-Off-By: Mark Brown <broonie@sirena.org.uk>

Signed-off-by: Jeff Garzik <jeff@garzik.org>