mailmap: add entry for Enric Balletbo i Serra

Map Enric's old corporate addresses to his kernel.org address.

Link: https://lkml.kernel.org/r/20230314115455.188818-1-eballetbo@kernel.orgSigned-off-by: Enric Balletbo i Serra <eballetbo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

.mailmap

@@ -133,6 +133,8 @@ Dmitry Safonov <0x7f454c46@gmail.com> <dsafonov@virtuozzo.com>
 Domen Puncer <domen@coderock.org>
 Douglas Gilbert <dougg@torque.net>
 Ed L. Cashin <ecashin@coraid.com>
+Enric Balletbo i Serra <eballetbo@kernel.org> <enric.balletbo@collabora.com>
+Enric Balletbo i Serra <eballetbo@kernel.org> <eballetbo@iseebcn.com>
 Erik Kaneda <erik.kaneda@intel.com> <erik.schmauss@intel.com>
 Eugen Hristev <eugen.hristev@collabora.com> <eugen.hristev@microchip.com>
 Evgeniy Polyakov <johnpol@2ka.mipt.ru>