platform/x86: asus-wmi: Delete impossible condition

The "asus->throttle_thermal_policy_mode" variable is a u8 so it can't
be negative.  And we always verify that the value is valid before
setting the policy mode so there is no need to check again here.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20210824113654.GA31143@kili
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/asus-wmi.c

@@ -2179,9 +2179,6 @@ static int platform_profile_get(struct platform_profile_handler *pprof,
 
 	tp = asus->throttle_thermal_policy_mode;
 
-	if (tp < 0)
-		return tp;
-
 	switch (tp) {
 	case ASUS_THROTTLE_THERMAL_POLICY_DEFAULT:
 		*profile = PLATFORM_PROFILE_BALANCED;