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-suite-b.h b/configs/config-suite-b.h
index 986d042..5fee1d1 100644
--- a/configs/config-suite-b.h
+++ b/configs/config-suite-b.h
@@ -64,6 +64,7 @@
 #define MBEDTLS_PK_C
 #define MBEDTLS_PK_PARSE_C
 #define MBEDTLS_SHA256_C
+#define MBEDTLS_SHA224_C
 #define MBEDTLS_SHA512_C
 #define MBEDTLS_SHA384_C
 #define MBEDTLS_SSL_CLI_C