Add new line at end of file to satisfy code style

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/programs/psa/psa_hash.c b/programs/psa/psa_hash.c
index ca9a8b3..86a59f1 100644
--- a/programs/psa/psa_hash.c
+++ b/programs/psa/psa_hash.c
@@ -159,4 +159,4 @@
     psa_hash_abort(&cloned_hash_operation);
     return EXIT_FAILURE;
 }
-#endif /* MBEDTLS_PSA_CRYPTO_C && PSA_WANT_ALG_SHA_256 */
\ No newline at end of file
+#endif /* MBEDTLS_PSA_CRYPTO_C && PSA_WANT_ALG_SHA_256 */