hwmon: (dell-smm) Add Latitude 5480 to fan control whitelist

This allows manual PWM control without the BIOS fighting back on Dell
Latitude 5480.
Signed-off-by: Jeffrey Lin <jeffrey@icurse.nl>
Acked-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20200621045246.929649-1-jeffrey@icurse.nlSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/dell-smm-hwmon.c

@@ -1187,6 +1187,14 @@ static struct dmi_system_id i8k_whitelist_fan_control[] __initdata = {
 		},
 		.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3],
 	},
+	{
+		.ident = "Dell Latitude 5480",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 5480"),
+		},
+		.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3],
+	},
 	{
 		.ident = "Dell Latitude E6440",
 		.matches = {