Fix typo in reader documentation

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
diff --git a/library/mps_reader.c b/library/mps_reader.c
index 9f08c52..a1c0a1c 100644
--- a/library/mps_reader.c
+++ b/library/mps_reader.c
@@ -71,7 +71,7 @@
     /* A plain memset() would likely be more efficient,
      * but the current way of zeroing makes it harder
      * to overlook fields which should not be zero-initialized.
-     * It's also more suitable for VF efforts since it
+     * It's also more suitable for FV efforts since it
      * doesn't require reasoning about structs being
      * interpreted as unstructured binary blobs. */
     static mbedtls_mps_reader const zero =