drm/i915: Put update_state_fb() next to the fb update

update_state_fb() at the end of intel_find_plane_obj() is misleading as
it leads us to believe the update is done for all code path.

A successful call to intel_alloc_plane_obj() will return and
update_state_fb() is then only needed when we share a fb from another
CRTC. Put the update() function there then.
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NMatt Roper <matthew.d.roper@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -2466,12 +2466,12 @@ intel_find_plane_obj(struct intel_crtc *intel_crtc,
 
 			drm_framebuffer_reference(c->primary->fb);
 			intel_crtc->base.primary->fb = c->primary->fb;
+			update_state_fb(intel_crtc->base.primary);
 			obj->frontbuffer_bits |= INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe);
 			break;
 		}
 	}
 
-	update_state_fb(intel_crtc->base.primary);
 }
 
 static void i9xx_update_primary_plane(struct drm_crtc *crtc,