Fix typo in define in comment
This fixes error in check-names.sh test.
#if defined(MBEDTLS_PSA_CRYPTO_CONFIG)
#include "psa/crypto_config.h"
-#endif /* defined(MBEDTLS_PSAY_CRYPTO_CONFIG) */
+#endif /* defined(MBEDTLS_PSA_CRYPTO_CONFIG) */
#ifdef __cplusplus
extern "C" {
