ARM: dts: stm32: Adapt STM32MP157C ED1 board to STM32 DT diversity

This commit adds security (cryp1) IP to stm32mp157c ED1 board by including
stm32mp15xc.dtsi file.
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c-ed1.dts

@@ -6,6 +6,7 @@
 /dts-v1/;
 
 #include "stm32mp157.dtsi"
+#include "stm32mp15xc.dtsi"
 #include "stm32mp15-pinctrl.dtsi"
 #include "stm32mp15xxaa-pinctrl.dtsi"
 #include <dt-bindings/gpio/gpio.h>