thermal: fix compiler warning

thermal_event_seqnum is not used when CONFIG_NET=n, which causes a
compiler warning.  Move the declaration within the CONFIG_NET clause to
eliminate the warning.

Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index e0d8ef7..7970e89 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -60,8 +60,6 @@
 static LIST_HEAD(thermal_cdev_list);
 static DEFINE_MUTEX(thermal_list_lock);
 
-static unsigned int thermal_event_seqnum;
-
 static int get_idr(struct idr *idr, struct mutex *lock, int *id)
 {
 	int err;
@@ -1318,6 +1316,8 @@
 EXPORT_SYMBOL(thermal_zone_device_unregister);
 
 #ifdef CONFIG_NET
+static unsigned int thermal_event_seqnum;
+
 static struct genl_family thermal_event_genl_family = {
 	.id = GENL_ID_GENERATE,
 	.name = THERMAL_GENL_FAMILY_NAME,