Fix typo in MPS test suite

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
diff --git a/tests/suites/test_suite_mps.function b/tests/suites/test_suite_mps.function
index aaaca97..d4cb69b 100644
--- a/tests/suites/test_suite_mps.function
+++ b/tests/suites/test_suite_mps.function
@@ -293,7 +293,7 @@
 void mbedtls_mps_reader_pausing( int option )
 {
     /* This test exercises the behaviour of the reader when the
-     * accumulator is used to fufill a consumer's request.
+     * accumulator is used to fulfill a consumer's request.
      *
      * More detailed:
      * - The producer feeds some data.