drm/i915/skl: Correcting the flushing of pipe

We were incorreectly bypassing the flush everytime which led to fifo
underrun when more than one plane is enabled.

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Satheeshakrishna M<satheeshakrishna.m@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_pm.c

@@ -3004,9 +3004,8 @@ static void skl_flush_wm_values(struct drm_i915_private *dev_priv,
 		    skl_ddb_entry_size(&cur_ddb->pipe[pipe])) {
 			skl_wm_flush_pipe(dev_priv, pipe, 2);
 			intel_wait_for_vblank(dev, pipe);
+			reallocated[pipe] = true;
 		}
-
-		reallocated[pipe] = true;
 	}
 
 	/*