drm/radeon/dpm: make some functions static for CI

Noticed by Rashika Kheria and cherry-picked from
her larger patch set.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Rashika Kheria <rashika.kheria@gmail.com>

drivers/gpu/drm/radeon/ci_dpm.c

@@ -4502,7 +4502,7 @@ static void ci_get_memory_type(struct radeon_device *rdev)
 
 }
 
-void ci_update_current_ps(struct radeon_device *rdev,
+static void ci_update_current_ps(struct radeon_device *rdev,
 				 struct radeon_ps *rps)
 {
 	struct ci_ps *new_ps = ci_get_ps(rps);
@@ -4513,7 +4513,7 @@ void ci_update_current_ps(struct radeon_device *rdev,
 	pi->current_rps.ps_priv = &pi->current_ps;
 }
 
-void ci_update_requested_ps(struct radeon_device *rdev,
+static void ci_update_requested_ps(struct radeon_device *rdev,
 				   struct radeon_ps *rps)
 {
 	struct ci_ps *new_ps = ci_get_ps(rps);
@@ -5001,7 +5001,7 @@ static int ci_parse_power_table(struct radeon_device *rdev)
 	return 0;
 }
 
-int ci_get_vbios_boot_values(struct radeon_device *rdev,
+static int ci_get_vbios_boot_values(struct radeon_device *rdev,
 				    struct ci_vbios_boot_state *boot_state)
 {
 	struct radeon_mode_info *mode_info = &rdev->mode_info;