drm/i915: Make intel_format_to_fourcc() static

v2: Fix conflict caused by the introduction of struct intel_crtc_state

Reviewed-By: Tvrtko Ursulin <tvrtko.ursulin@intel.com> (v1)
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -2316,7 +2316,7 @@ unsigned long intel_gen4_compute_page_offset(int *x, int *y,
 	}
 }
 
-int intel_format_to_fourcc(int format)
+static int intel_format_to_fourcc(int format)
 {
 	switch (format) {
 	case DISPPLANE_8BPP:

drivers/gpu/drm/i915/intel_drv.h

@@ -991,7 +991,6 @@ enum intel_display_power_domain
 intel_display_port_power_domain(struct intel_encoder *intel_encoder);
 void intel_mode_from_pipe_config(struct drm_display_mode *mode,
 				 struct intel_crtc_state *pipe_config);
-int intel_format_to_fourcc(int format);
 void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc);
 void intel_modeset_preclose(struct drm_device *dev, struct drm_file *file);