Separate SHA224 from SHA256 config options.

These options are still dependant on each other.
This is an intermediate step.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/configs/config-no-entropy.h b/configs/config-no-entropy.h
index 24822ea..066048e 100644
--- a/configs/config-no-entropy.h
+++ b/configs/config-no-entropy.h
@@ -74,6 +74,7 @@
 #define MBEDTLS_PLATFORM_C
 #define MBEDTLS_RSA_C
 #define MBEDTLS_SHA256_C
+#define MBEDTLS_SHA224_C
 #define MBEDTLS_SHA512_C
 #define MBEDTLS_SHA384_C
 #define MBEDTLS_VERSION_C