drm: Fix build when FBDEV_EMULATION is disabled

Commit be7f735cd5ea ("drm: Rely on mode_config data for fb_helper
initialization") broke the build when CONFIG_DRM_FBDEV_EMULATION is
disabled because it didn't update the prototype for drm_fb_helper_init
in that case.

Fixes: be7f735cd5ea ("drm: Rely on mode_config data for fb_helper
initialization")
Signed-off-by: Gabriel Krisman Bertazi <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

include/drm/drm_fb_helper.h

···
 }
 
 static inline int drm_fb_helper_init(struct drm_device *dev,
-		       struct drm_fb_helper *helper, int crtc_count,
+		       struct drm_fb_helper *helper,
 		       int max_conn)
 {
 	return 0;