[PATCH -next] hwmon: fix gpio-fan.c build

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Fix build error when CONFIG_THERMAL=m and SENSORS_GPIO_FAN=y
by preventing that combination.

Fixes these build errors:

drivers/built-in.o: In function `gpio_fan_remove':
gpio-fan.c:(.text+0x21e97e): undefined reference to `thermal_cooling_device_unregister'
drivers/built-in.o: In function `gpio_fan_probe':
gpio-fan.c:(.text+0x21efbc): undefined reference to `thermal_cooling_device_register'

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc:	Jean Delvare <jdelvare@xxxxxxx>
Cc:	Guenter Roeck <linux@xxxxxxxxxxxx>
Cc:	lm-sensors@xxxxxxxxxxxxxx
Cc:	Simon Guinot <sguinot@xxxxxxxxx>
---
 drivers/hwmon/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20150310.orig/drivers/hwmon/Kconfig
+++ linux-next-20150310/drivers/hwmon/Kconfig
@@ -510,6 +510,7 @@ config SENSORS_G762
 config SENSORS_GPIO_FAN
 	tristate "GPIO fan"
 	depends on GPIOLIB
+	depends on THERMAL || THERMAL=n
 	help
 	  If you say yes here you get support for fans connected to GPIO lines.
 
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