mailmap: Add an entry for my email address

My @linaro.org email address doesn't exist anymore so add a
mailmap entry to map it to my @gmail.com address.

Signed-off-by: Todor Tomov <todor.too@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

.mailmap

@@ -225,6 +225,7 @@ Sumit Semwal <sumit.semwal@ti.com>
 Tejun Heo <htejun@gmail.com>
 Thomas Graf <tgraf@suug.ch>
 Thomas Pedersen <twp@codeaurora.org>
+Todor Tomov <todor.too@gmail.com> <todor.tomov@linaro.org>
 Tony Luck <tony.luck@intel.com>
 TripleX Chung <xxx.phy@gmail.com> <zhongyu@18mail.cn>
 TripleX Chung <xxx.phy@gmail.com> <triplex@zh-kernel.org>