drm: Don't EXPORT drm_add/reset_display_info

Only used within drm.ko, no need to tempt drivers.

Cc: Keith Packard <keithp@keithp.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180424142242.12093-1-daniel.vetter@ffwll.ch

drivers/gpu/drm/drm_crtc_internal.h

@@ -220,3 +220,5 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
 
 /* drm_edid.c */
 void drm_mode_fixup_1366x768(struct drm_display_mode *mode);
+void drm_reset_display_info(struct drm_connector *connector);
+u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid);

drivers/gpu/drm/drm_edid.c

@@ -4454,7 +4454,6 @@ drm_reset_display_info(struct drm_connector *connector)
 
 	info->non_desktop = 0;
 }
-EXPORT_SYMBOL_GPL(drm_reset_display_info);
 
 u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid)
 {
@@ -4538,7 +4537,6 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi
 		info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
 	return quirks;
 }
-EXPORT_SYMBOL_GPL(drm_add_display_info);
 
 static int validate_displayid(u8 *displayid, int length, int idx)
 {

include/drm/drm_edid.h

@@ -465,8 +465,6 @@ struct edid *drm_get_edid(struct drm_connector *connector,
 struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
 				     struct i2c_adapter *adapter);
 struct edid *drm_edid_duplicate(const struct edid *edid);
-void drm_reset_display_info(struct drm_connector *connector);
-u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid);
 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
 
 u8 drm_match_cea_mode(const struct drm_display_mode *to_match);