hwmon: jc42 depends on I2C

jc42 uses i2c interfaces, so it should depend on I2C.

drivers/hwmon/jc42.c:426: error: implicit declaration of function 'i2c_check_functionality'
drivers/hwmon/jc42.c:521: error: implicit declaration of function 'i2c_smbus_read_word_data'
drivers/hwmon/jc42.c:529: error: implicit declaration of function 'i2c_smbus_write_word_data'
drivers/hwmon/jc42.c:580: error: implicit declaration of function 'i2c_add_driver'
drivers/hwmon/jc42.c:585: error: implicit declaration of function 'i2c_del_driver'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/hwmon/Kconfig

@@ -465,6 +465,7 @@ config SENSORS_JZ4740
 
 config SENSORS_JC42
 	tristate "JEDEC JC42.4 compliant temperature sensors"
+	depends on I2C
 	help
 	  If you say yes here you get support for Jedec JC42.4 compliant
 	  temperature sensors. Support will include, but not be limited to,