Fix Doxygen headers for MPS files

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
diff --git a/library/mps_common.h b/library/mps_common.h
index e541f4f..dd6e31b 100644
--- a/library/mps_common.h
+++ b/library/mps_common.h
@@ -18,7 +18,7 @@
  */
 
 /**
- * \file common.h
+ * \file mps_common.h
  *
  * \brief Common functions and macros used by MPS
  */