mailmap: add entries for Paul Mackerras

Link: https://lkml.kernel.org/r/ZEYpTAufVHTvsO1n@cleo
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: paulusmack

.mailmap

@@ -370,6 +370,8 @@ Paul E. McKenney <paulmck@kernel.org> <paul.mckenney@linaro.org>
 Paul E. McKenney <paulmck@kernel.org> <paulmck@linux.ibm.com>
 Paul E. McKenney <paulmck@kernel.org> <paulmck@linux.vnet.ibm.com>
 Paul E. McKenney <paulmck@kernel.org> <paulmck@us.ibm.com>
+Paul Mackerras <paulus@ozlabs.org> <paulus@samba.org>
+Paul Mackerras <paulus@ozlabs.org> <paulus@au1.ibm.com>
 Peter A Jonsson <pj@ludd.ltu.se>
 Peter Oruba <peter.oruba@amd.com>
 Peter Oruba <peter@oruba.de>