openthread: Fix build warning due to wrong MBEDTLS config

ArekBalysNordic · carlescufi · commit 174705e63548 · 2025-08-08T12:24:44.000+02:00
The MBEDTLS_MPI_MAX_SIZE must be set to 256 to be compliant
with Thread libraries.

Signed-off-by: Arkadiusz Balys &lt;arkadiusz.balys@nordicsemi.no&gt;
diff --git a/subsys/net/openthread/Kconfig.defconfig b/subsys/net/openthread/Kconfig.defconfig
@@ -132,6 +132,9 @@ config MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 	default n if !(OPENTHREAD_JOINER || OPENTHREAD_COMMISSIONER || OPENTHREAD_COAPS || OPENTHREAD_BLE_TCAT)
 	default y
 
+config MBEDTLS_MPI_MAX_SIZE
+	default 256
+
 config MBEDTLS_ENTROPY_C
 	default y
 
