mailmap: Update email address for Gregory CLEMENT

As now Free Electrons is Bootlin.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
diff --git a/.mailmap b/.mailmap
index e18cab7..a2ce89a 100644
--- a/.mailmap
+++ b/.mailmap
@@ -62,6 +62,7 @@
 Greg Kroah-Hartman <greg@echidna.(none)>
 Greg Kroah-Hartman <gregkh@suse.de>
 Greg Kroah-Hartman <greg@kroah.com>
+Gregory CLEMENT <gregory.clement@bootlin.com> <gregory.clement@free-electrons.com>
 Henk Vergonet <Henk.Vergonet@gmail.com>
 Henrik Kretzschmar <henne@nachtwindheim.de>
 Henrik Rydberg <rydberg@bitmath.org>