stm32mp: activate the command stboard for stm32mp25 boards

Activate the command stboard for stm32mp25 STMicroelectronics boards,
add the default used OTP identifier and the associated board identifier:
- stm32mp25xx-ev1 = MB1936
- stm32mp25xx-dk = MB1605

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/include/mach/stm32.h b/arch/arm/mach-stm32mp/include/mach/stm32.h
index 45c929a..726c390 100644
--- a/arch/arm/mach-stm32mp/include/mach/stm32.h
+++ b/arch/arm/mach-stm32mp/include/mach/stm32.h
@@ -198,6 +198,7 @@
 #define BSEC_OTP_SERIAL	5
 #define BSEC_OTP_RPN	9
 #define BSEC_OTP_PKG	122
+#define BSEC_OTP_BOARD	246
 #define BSEC_OTP_MAC	247
 #endif