fix: hwmon: axi_fan_control: Set tacho parameters

The driver was writting on the wrong register to set the tacho
parameters. For the core to start monitoring the signal, the driver has
to set the TACH_TOLERANCE register. This has to be done after writting
on TACH_PERIOD.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
(cherry picked from commit 0e51d44)

drivers/hwmon/axi_fan_control.c

@@ -279,7 +279,7 @@ static irqreturn_t axi_fan_control_irq_handler(int irq, void *data)
 			axi_fan_control_iowrite(new_tach,
 					ADI_REG_TACH_PERIOD, ctl);
 			axi_fan_control_iowrite(tach_tol,
-					ADI_REG_TACH_MEASUR, ctl);
+					ADI_REG_TACH_TOLERANCE, ctl);
 			ctl->update_tacho_params = false;
 		}