Fix typo in MPS test suite

Signed-off-by: Hanno Becker <[email protected]>

.gitignore

@@ -56,3 +56,4 @@ massif-*
 /TAGS
 /cscope*.out
 /tags
+/cmake_baremetal/tests/test_suite_aes.ecb.datax

tests/suites/test_suite_mps.function

@@ -293,7 +293,7 @@ void mbedtls_mps_reader_pausing_needed_buffer_too_small()
 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.