Newlines at end of file + trim trailing whitespace

Signed-off-by: Aditya Deshpande <aditya.deshpande@arm.com>
diff --git a/tests/include/test/drivers/key_agreement.h b/tests/include/test/drivers/key_agreement.h
index 57de81a..b04bc59 100644
--- a/tests/include/test/drivers/key_agreement.h
+++ b/tests/include/test/drivers/key_agreement.h
@@ -68,4 +68,4 @@
     size_t *shared_secret_length );
 
 #endif /*PSA_CRYPTO_DRIVER_TEST */
-#endif /* PSA_CRYPTO_TEST_DRIVERS_KEY_AGREEMENT_H */
\ No newline at end of file
+#endif /* PSA_CRYPTO_TEST_DRIVERS_KEY_AGREEMENT_H */