[PATCH] drm/sti: mark symbols static where possible

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We get 2 warnings when building kernel with W=1:
drivers/gpu/drm/sti/sti_mixer.c:361:6: warning: no previous prototype for 'sti_mixer_set_matrix' [-Wmissing-prototypes]
drivers/gpu/drm/sti/sti_dvo.c:109:5: warning: no previous prototype for 'dvo_awg_generate_code' [-Wmissing-prototypes]

In fact, these functions are only used in the file in which they are
declared and don't need a declaration, but can be made static.
So this patch marks these functions with 'static'.

Signed-off-by: Baoyou Xie <baoyou.xie@xxxxxxxxxx>
---
 drivers/gpu/drm/sti/sti_dvo.c   | 3 ++-
 drivers/gpu/drm/sti/sti_mixer.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index 00881eb..4545ad0 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -106,7 +106,8 @@ struct sti_dvo_connector {
 	container_of(x, struct sti_dvo_connector, drm_connector)
 
 #define BLANKING_LEVEL 16
-int dvo_awg_generate_code(struct sti_dvo *dvo, u8 *ram_size, u32 *ram_code)
+static int
+dvo_awg_generate_code(struct sti_dvo *dvo, u8 *ram_size, u32 *ram_code)
 {
 	struct drm_display_mode *mode = &dvo->mode;
 	struct dvo_config *config = dvo->config;
diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c
index 7d9aea8..b78cec5 100644
--- a/drivers/gpu/drm/sti/sti_mixer.c
+++ b/drivers/gpu/drm/sti/sti_mixer.c
@@ -358,7 +358,7 @@ int sti_mixer_set_plane_status(struct sti_mixer *mixer,
 	return 0;
 }
 
-void sti_mixer_set_matrix(struct sti_mixer *mixer)
+static void sti_mixer_set_matrix(struct sti_mixer *mixer)
 {
 	unsigned int i;
 
-- 
2.7.4

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