drm/nouveau/fan: fix a typo in PWM's input clock calculation

Reported-by: Jukka Hopeavuori <jukka.hopea@gmail.com>
Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c

@@ -92,7 +92,7 @@ nv50_fan_pwm_clock(struct nouveau_therm *therm)
 		if (nv_rd32(therm, 0xc040) & 0x800000) {
 			/* Use the HOST clock (100 MHz)
 			* Where does this constant(2.4) comes from? */
-			pwm_clock = (100000000 >> pwm_div) / 10 / 24;
+			pwm_clock = (100000000 >> pwm_div) * 10 / 24;
 		} else {
 			/* Where does this constant(20) comes from? */
 			pwm_clock = (crystal * 1000) >> pwm_div;