Fix typo in define in comment

This fixes error in check-names.sh test.

Signed-off-by: John Durkop <john.durkop@fermatsoftware.com>
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index 8b32378..8e76372 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -28,7 +28,7 @@
 
 #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" {