Update requires for MBEDTLS_PSA_CRYPTO_DRIVERS

In order to test various PSA crypto settings the Requires section
needed updating to require MBEDTLS_PSA_CRYPTO_C or
MBEDTLS_PSA_CRYPTO_CONFIG.

Signed-off-by: John Durkop <john.durkop@fermatsoftware.com>
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index cb84c86..4e2185d 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1330,7 +1330,7 @@
  *
  * Enable support for the experimental PSA crypto driver interface.
  *
- * Requires: MBEDTLS_PSA_CRYPTO_C.
+ * Requires: MBEDTLS_PSA_CRYPTO_C or MBEDTLS_PSA_CRYPTO_CONFIG
  *
  * \warning This interface is experimental and may change or be removed
  * without notice.