MAINTAINERS: Update my email address

My @arm.com address will stop working in a couple of weeks. Update
MAINTAINERS and .mailmap files with an address I'll have access to.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
diff --git a/.mailmap b/.mailmap
index 23cfed2..1043793 100644
--- a/.mailmap
+++ b/.mailmap
@@ -116,6 +116,7 @@
 Juha Yrjola <at solidboot.com>
 Juha Yrjola <juha.yrjola@nokia.com>
 Juha Yrjola <juha.yrjola@solidboot.com>
+Julien Thierry <julien.thierry.kdev@gmail.com> <julien.thierry@arm.com>
 Kay Sievers <kay.sievers@vrfy.org>
 Kenneth W Chen <kenneth.w.chen@intel.com>
 Konstantin Khlebnikov <koct9i@gmail.com> <k.khlebnikov@samsung.com>