remoteproc: qcom: Make ssr_notifiers local

The ssr_notifiers variable should be local, so add the missing static
storage classifier.

Fixes: 1e140df049 ("remoteproc: qcom: Add support for SSR notifications")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/remoteproc/qcom_common.c

@@ -28,7 +28,7 @@
 #define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
 #define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)
 
-BLOCKING_NOTIFIER_HEAD(ssr_notifiers);
+static BLOCKING_NOTIFIER_HEAD(ssr_notifiers);
 
 /**
  * qcom_mdt_find_rsc_table() - provide dummy resource table for remoteproc