mailmap: add entry for AKASHI Takahiro

Akashi-san's Linaro email address in not valid anymore.

Cc: AKASHI Takahiro <akashi.tkhro@gmail.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/.mailmap b/.mailmap
index 932bd4d..8049856 100644
--- a/.mailmap
+++ b/.mailmap
@@ -15,6 +15,7 @@
 # Proper Name <proper@email.xx> <commit@email.xx>
 # Proper Name <proper@email.xx> Commit Name <commit@email.xx>
 
+AKASHI Takahiro <akashi.tkhro@gmail.com> <takahiro.akashi@linaro.org>
 Alexander Graf <agraf@csgraf.de> <agraf@suse.de>
 Allen Martin <amartin@nvidia.com>
 Amanda Baze <amanda.baze@amd.com> <nicole.baze@xilinx.com>