drm/fb-helper: unexport drm_fb_helper_single_fb_probe

Not called by anyone, and really, shouldn't be. Drivers are supposed
either drm_fb_helper_initial_config or drm_fb_helper_hotplug_event.
Originally this was done differently, but is now consolidated in the
helper functions and no longer done by drivers directly.
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_fb_helper.c

@@ -754,7 +754,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 }
 EXPORT_SYMBOL(drm_fb_helper_pan_display);
 
-int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
+static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 					 int preferred_bpp)
 {
 	int new_fb = 0;
@@ -870,7 +870,6 @@ int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 
 	return 0;
 }
-EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
 
 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
 			    uint32_t depth)

include/drm/drm_fb_helper.h

@@ -82,9 +82,6 @@ struct drm_fb_helper {
 	bool delayed_hotplug;
 };
 
-int drm_fb_helper_single_fb_probe(struct drm_fb_helper *helper,
-				  int preferred_bpp);
-
 int drm_fb_helper_init(struct drm_device *dev,
 		       struct drm_fb_helper *helper, int crtc_count,
 		       int max_conn);