Revert "drm/i915: fix DP get_hw_state return value"

This reverts commit deb18211.

It completely breaks the logic, since when we fall through to the end
of the function we actually _have_ figured out the correct pipe.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_dp.c

@@ -1328,7 +1328,7 @@ static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
 			      intel_dp->output_reg);
 	}
 
-	return false;
+	return true;
 }
 
 static void intel_disable_dp(struct intel_encoder *encoder)