platform/x86: asus-wmi: Don't load fan curves without fan

If we do not have a fan it does not make sense to load curves for it.
This removes the following warnings from the kernel log:

asus_wmi: fan_curve_get_factory_default (0x00110024) failed: -19
asus_wmi: fan_curve_get_factory_default (0x00110025) failed: -19

Fixes: a2bdf10c ("platform/x86: asus-wmi: Increase FAN_CURVE_BUF_LEN to 32")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20221221-asus-fan-v1-3-e07f3949725b@weissschuh.netReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/asus-wmi.c

@@ -2438,6 +2438,9 @@ static int fan_curve_check_present(struct asus_wmi *asus, bool *available,
 
 	*available = false;
 
+	if (asus->fan_type == FAN_TYPE_NONE)
+		return 0;
+
 	err = fan_curve_get_factory_default(asus, fan_dev);
 	if (err) {
 		return 0;