drm/i915: Use the cached min/min/rpe values in the vlv debugfs code

No need to re-read the hardware rps fuses when we already have all the
values tucked away in dev_priv->rps.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 780c3ab..2bc08a2 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3781,7 +3781,7 @@
 	mutex_unlock(&dev_priv->rps.hw_lock);
 }
 
-int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
+static int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
 {
 	u32 val, rp0;
 
@@ -3801,7 +3801,7 @@
 	return rpe;
 }
 
-int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
+static int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
 {
 	u32 val, rpn;
 
@@ -3810,7 +3810,7 @@
 	return rpn;
 }
 
-int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
+static int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
 {
 	u32 val, rp0;
 
@@ -3835,7 +3835,7 @@
 	return rpe;
 }
 
-int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
+static int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
 {
 	return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
 }