ARM: dts: stm32: add reset binding on stm32mp157c

This patch adds reset binding file.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Reviewed-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c.dtsi

@@ -5,6 +5,7 @@
  */
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/clock/stm32mp1-clks.h>
+#include <dt-bindings/reset/stm32mp1-resets.h>
 
 / {
 	#address-cells = <1>;