Thermal: Documentation update

With commit 6503e5df08008b9a47022b5e9ebba658c8fa69af,
the value of /sys/class/thermal/thermal_zoneX/mode has been changed
from user/kernel to enabled/disabled.
Update the documentation so that users won't be confused.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 2107d1b..8275e7b 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -550,8 +550,6 @@
 	return 0;
 }
 
-static const char enabled[] = "kernel";
-static const char disabled[] = "user";
 static int thermal_get_mode(struct thermal_zone_device *thermal,
 				enum thermal_device_mode *mode)
 {
@@ -588,8 +586,8 @@
 	if (enable != tz->tz_enabled) {
 		tz->tz_enabled = enable;
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"%s ACPI thermal control\n",
-			tz->tz_enabled ? enabled : disabled));
+			"%s kernel ACPI thermal control\n",
+			tz->tz_enabled ? "Enable" : "Disable"));
 		acpi_thermal_check(tz);
 	}
 	return 0;