drm/hdcp: drm_hdcp_request_srm() as static

Below Sparsh warnings are fixed.

Commit: drm: revocation check at drm subsystem
+drivers/gpu/drm/drm_hdcp.c:235:6: warning: symbol
'drm_hdcp_request_srm' was not declared. Should it be static?
+drivers/gpu/drm/drm_hdcp.c:27:3: warning: symbol 'srm_data' was not
declared. Should it be static?
+drivers/gpu/drm/drm_hdcp.c:317:5: warning: symbol 'drm_setup_hdcp_srm'
was not declared. Should it be static?
+drivers/gpu/drm/drm_hdcp.c:327:6: warning: symbol
'drm_teardown_hdcp_srm' was not declared. Should it be static?

cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190513133504.18612-1-ramalingam.c@intel.com

drivers/gpu/drm/drm_hdcp.c

@@ -21,7 +21,9 @@
 #include <drm/drm_mode_object.h>
 #include <drm/drm_connector.h>
 
-struct hdcp_srm {
+#include "drm_internal.h"
+
+static struct hdcp_srm {
 	u32 revoked_ksv_cnt;
 	u8 *revoked_ksv_list;
 
@@ -235,7 +237,7 @@ static void drm_hdcp_srm_update(const u8 *buf, size_t count)
 		drm_hdcp_parse_hdcp2_srm(buf, count);
 }
 
-void drm_hdcp_request_srm(struct drm_device *drm_dev)
+static void drm_hdcp_request_srm(struct drm_device *drm_dev)
 {
 	char fw_name[36] = "display_hdcp_srm.bin";
 	const struct firmware *fw;

drivers/gpu/drm/drm_internal.h

@@ -106,6 +106,7 @@ void drm_sysfs_connector_remove(struct drm_connector *connector);
 void drm_sysfs_lease_event(struct drm_device *dev);
 
 /* drm_gem.c */
+struct drm_gem_object;
 int drm_gem_init(struct drm_device *dev);
 void drm_gem_destroy(struct drm_device *dev);
 int drm_gem_handle_create_tail(struct drm_file *file_priv,