mailmap: add Antoine Tenart's email

I used "Antoine Ténart" at first but then moved to a name without accent
as this cause some issues from time to time...  Add my email in the
mailmap file to have a consistent shortlog output.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Antoine Tenart <[email protected]>
Cc: Antoine Tenart <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

.mailmap

@@ -21,6 +21,7 @@ Andrey Ryabinin <[email protected]> <[email protected]>
 Andrew Morton <[email protected]>
 Andrew Vasquez <[email protected]>
 Andy Adamson <[email protected]>
+Antoine Tenart <[email protected]>
 Antonio Ospite <[email protected]> <[email protected]>
 Archit Taneja <[email protected]>
 Arnaud Patard <[email protected]>