MAINTAINERS: fix email address case

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 7a015a5..1299cbb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -624,7 +624,7 @@
 
 	jornada	SA1110
 
-Fabio Estevam <Fabio.Estevam@freescale.com>
+Fabio Estevam <fabio.estevam@freescale.com>
 
 	mx31pdk		i.MX31