MAINTAINERS: EP93XX: Update maintainership

As agreed with Ryan, change the maintainership.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Acked-by: Ryan Mallon <rmallon@gmail.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

MAINTAINERS

@@ -1172,7 +1172,7 @@ N:	clps711x
 
 ARM/CIRRUS LOGIC EP93XX ARM ARCHITECTURE
 M:	Hartley Sweeten <hsweeten@visionengravers.com>
-M:	Ryan Mallon <rmallon@gmail.com>
+M:	Alexander Sverdlin <alexander.sverdlin@gmail.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	arch/arm/mach-ep93xx/