Fix value check in set_pwm_mode(). Instead of checking for chip variant there,
make pwmX_mode sysfs nodes only writable on f75375 variant.
Signed-off-by: NRiku Voipio <riku.voipio@movial.fi>
Acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NMark M. Hoffman <mhoffman@lightlink.com>