doc: arch: m68k: fix maintainer email

Fix email with currently used address.

Signed-off-by: Angelo Dureghello <angelo@kernel-space.org>
diff --git a/doc/arch/m68k.rst b/doc/arch/m68k.rst
index a9180fd..8474ece 100644
--- a/doc/arch/m68k.rst
+++ b/doc/arch/m68k.rst
@@ -5,7 +5,7 @@
 
 History
 -------
-* November 02, 2017	Angelo Dureghello <angelo@sysam.it>
+* November 02, 2017	Angelo Dureghello <angelo@kernel-space.org>
 * August   08, 2005	Jens Scharsig <esw@bus-elektronik.de>
   MCF5282 implementation without preloader
 * January  12, 2004	<josef.baumgartner@telex.de>