drm/edid: Make drm_get_cea_aspect_ratio() static

drm_get_cea_aspect_ratio() is not used outside drm_edid.c.
Make it static.

Cc: Wayne Lin <waynelin@amd.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004141914.20600-1-ville.syrjala@linux.intel.comReviewed-by: Uma Shankar <uma.shankar@intel.com>

drivers/gpu/drm/drm_edid.c

@@ -3206,18 +3206,10 @@ static bool drm_valid_cea_vic(u8 vic)
 	return vic > 0 && vic < ARRAY_SIZE(edid_cea_modes);
 }
 
-/**
- * drm_get_cea_aspect_ratio - get the picture aspect ratio corresponding to
- * the input VIC from the CEA mode list
- * @video_code: ID given to each of the CEA modes
- *
- * Returns picture aspect ratio
- */
-enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code)
+static enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code)
 {
 	return edid_cea_modes[video_code].picture_aspect_ratio;
 }
-EXPORT_SYMBOL(drm_get_cea_aspect_ratio);
 
 /*
  * Calculate the alternate clock for HDMI modes (those from the HDMI vendor

include/drm/drm_edid.h

@@ -481,7 +481,6 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
 int drm_add_override_edid_modes(struct drm_connector *connector);
 
 u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
-enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
 bool drm_detect_hdmi_monitor(struct edid *edid);
 bool drm_detect_monitor_audio(struct edid *edid);
 enum hdmi_quantization_range