feat(stm32mp1-fdts): update NVMEM nodes

Set non-secure property on platform secure OTP nodes that non-secure
world is allowed to access through secure world services.
These are the SoC MAC address and the ST boards board_id OTPs.
Most of these were already done but it was missing for ED1 board.

Change-Id: Idfa6322d9d5c35285706d0b2d32ae09af38684a7
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
diff --git a/fdts/stm32mp157c-ed1.dts b/fdts/stm32mp157c-ed1.dts
index 2de90d8..44c7016 100644
--- a/fdts/stm32mp157c-ed1.dts
+++ b/fdts/stm32mp157c-ed1.dts
@@ -33,8 +33,7 @@
 &bsec {
 	board_id: board_id@ec {
 		reg = <0xec 0x4>;
-		status = "okay";
-		secure-status = "okay";
+		st,non-secure-otp;
 	};
 };