The armada_overlay_duplicate_state is not declared outside
the unit, so make it static to avoid the following sparse
warning:

drivers/gpu/drm/armada/armada_overlay.c:328:24: warning: symbol 
'armada_overlay_duplicate_state' was not declared. Should it be static?

Signed-off-by: Ben Dooks <[email protected]>
---
Cc: Russell King <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: [email protected]
---
 drivers/gpu/drm/armada/armada_overlay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/armada/armada_overlay.c 
b/drivers/gpu/drm/armada/armada_overlay.c
index 07f0da4d9ba1..b3e942121fd7 100644
--- a/drivers/gpu/drm/armada/armada_overlay.c
+++ b/drivers/gpu/drm/armada/armada_overlay.c
@@ -325,7 +325,7 @@ static void armada_overlay_reset(struct drm_plane *plane)
        }
 }
 
-struct drm_plane_state *
+static struct drm_plane_state *
 armada_overlay_duplicate_state(struct drm_plane *plane)
 {
        struct armada_overlay_state *state;
-- 
2.23.0

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