drm/i915: Make intel_encoder_dpms() static

And also fix a small typo in the intel_encoder_dpms() comment.
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -3889,10 +3889,10 @@ void intel_encoder_destroy(struct drm_encoder *encoder)
 	kfree(intel_encoder);
 }
 
-/* Simple dpms helper for encodres with just one connector, no cloning and only
+/* Simple dpms helper for encoders with just one connector, no cloning and only
  * one kind of off state. It clamps all !ON modes to fully OFF and changes the
  * state of the entire output pipe. */
-void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
+static void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
 {
 	if (mode == DRM_MODE_DPMS_ON) {
 		encoder->connectors_active = true;

drivers/gpu/drm/i915/intel_drv.h

@@ -583,7 +583,6 @@ extern void intel_crtc_restore_mode(struct drm_crtc *crtc);
 extern void intel_crtc_load_lut(struct drm_crtc *crtc);
 extern void intel_crtc_update_dpms(struct drm_crtc *crtc);
 extern void intel_encoder_destroy(struct drm_encoder *encoder);
-extern void intel_encoder_dpms(struct intel_encoder *encoder, int mode);
 extern void intel_connector_dpms(struct drm_connector *, int mode);
 extern bool intel_connector_get_hw_state(struct intel_connector *connector);
 extern void intel_modeset_check_state(struct drm_device *dev);