MAINTAINERS/mailmap: Update my email address

Update my email address to the NXP account.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/.mailmap b/.mailmap
index c7bb0ef..02dccfc 100644
--- a/.mailmap
+++ b/.mailmap
@@ -12,7 +12,7 @@
 Andreas Bießmann <andreas.devel@googlemail.com>
 Aneesh V <aneesh@ti.com>
 Dirk Behme <dirk.behme@googlemail.com>
-Fabio Estevam <fabio.estevam@freescale.com>
+Fabio Estevam <fabio.estevam@nxp.com>
 Jagan Teki <402jagan@gmail.com>
 Jagan Teki <jaganna@gmail.com>
 Jagan Teki <jaganna@xilinx.com>