drm/radeon: Mark all possible functions / structs as static

Let's allow GCC to optimize better.

This exposed some five unused functions, but this patch doesn't remove them.

Signed-off-by: Lauri Kasanen <cand@gmx.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c
index 3b663fc..5cd5ace 100644
--- a/drivers/gpu/drm/radeon/rs690.c
+++ b/drivers/gpu/drm/radeon/rs690.c
@@ -145,7 +145,7 @@
 	rdev->pm.sideport_bandwidth.full = dfixed_div(rdev->pm.sideport_bandwidth, tmp);
 }
 
-void rs690_mc_init(struct radeon_device *rdev)
+static void rs690_mc_init(struct radeon_device *rdev)
 {
 	u64 base;
 
@@ -224,7 +224,7 @@
 	fixed20_12 sclk;
 };
 
-void rs690_crtc_bandwidth_compute(struct radeon_device *rdev,
+static void rs690_crtc_bandwidth_compute(struct radeon_device *rdev,
 				  struct radeon_crtc *crtc,
 				  struct rs690_watermark *wm)
 {
@@ -581,7 +581,7 @@
 	WREG32(R_000078_MC_INDEX, 0x7F);
 }
 
-void rs690_mc_program(struct radeon_device *rdev)
+static void rs690_mc_program(struct radeon_device *rdev)
 {
 	struct rv515_mc_save save;