stm32mp1: bsec: use device tree new compatible

Update bsec driver to use the device tree provided by Kernel.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/dts/stm32mp157-u-boot.dtsi b/arch/arm/dts/stm32mp157-u-boot.dtsi
index 90d13f3..2594702 100644
--- a/arch/arm/dts/stm32mp157-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp157-u-boot.dtsi
@@ -39,6 +39,10 @@
 	};
 };
 
+&bsec {
+	u-boot,dm-pre-reloc;
+};
+
 &clk_hsi {
 	u-boot,dm-pre-reloc;
 };