thermal: core: move thermal_zone sysfs to thermal_sysfs.c

This is a code reorganization, simply to concentrate
the code handling sysfs in a specific file: thermal_sysfs.c.

Right now, moving only the sysfs entries of thermal_zone_device.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

drivers/thermal/Makefile

@@ -3,7 +3,7 @@
 #
 
 obj-$(CONFIG_THERMAL)		+= thermal_sys.o
-thermal_sys-y			+= thermal_core.o
+thermal_sys-y			+= thermal_core.o thermal_sysfs.o
 
 # interface to/from other layers providing sensors
 thermal_sys-$(CONFIG_THERMAL_HWMON)		+= thermal_hwmon.o

drivers/thermal/thermal_core.h

@@ -66,6 +66,9 @@ void thermal_zone_device_unbind_exception(struct thermal_zone_device *,
 int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
 int thermal_build_list_of_policies(char *buf);
 
+/* sysfs I/F */
+int thermal_zone_create_device_groups(struct thermal_zone_device *, int);
+
 #ifdef CONFIG_THERMAL_GOV_STEP_WISE
 int thermal_gov_step_wise_register(void);
 void thermal_gov_step_wise_unregister(void);