Documentation: Add my name to kernel enforcement statement

The kernel enforcement statement commit had my Acked-by: but missed my
name in the document signatures.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/process/kernel-enforcement-statement.rst

@@ -121,6 +121,7 @@ we might work for today, have in the past, or will in the future.
   - Ingo Molnar
   - Kuninori Morimoto
   - Trond Myklebust
+  - Martin K. Petersen (Oracle)
   - Borislav Petkov
   - Jiri Pirko
   - Josh Poimboeuf