Removes trailing whitespace

Travis found and complained about a trailing whitespace.
This commit removes the error.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/tests/suites/test_suite_psa_crypto_driver_wrappers.function b/tests/suites/test_suite_psa_crypto_driver_wrappers.function
index e642ec7..8a53509 100644
--- a/tests/suites/test_suite_psa_crypto_driver_wrappers.function
+++ b/tests/suites/test_suite_psa_crypto_driver_wrappers.function
@@ -2534,7 +2534,7 @@
 
         TEST_EQUAL( mbedtls_test_driver_aead_hooks.hits_abort,
                     forced_status == PSA_SUCCESS ? 1 : 0 );
-        
+
         ASSERT_COMPARE( expected_result->x, expected_result->len,
                         output_data, output_length + verify_output_length );
     }