ARM: dts: stm32: DT alignment with kernel v5.3

Device tree and binding alignment with kernel v5.3
and converted to SPDX.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/dts/stm32f469.dtsi b/arch/arm/dts/stm32f469.dtsi
index 0d58d40..69c862d 100644
--- a/arch/arm/dts/stm32f469.dtsi
+++ b/arch/arm/dts/stm32f469.dtsi
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
 /* Copyright (C) STMicroelectronics 2017 - All Rights Reserved */
 
 #include "stm32f429.dtsi"