MAINTAINERS: Update Allwinner entry and add new maintainer

Add Chen-Yu Tsai as a co-maintainer to the ARM sunxi support.

While we are doing so, also update the entry for new SoCs.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -894,11 +894,12 @@ M:	Lennert Buytenhek <kernel@wantstofly.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 
-ARM/Allwinner A1X SoC support
+ARM/Allwinner sunXi SoC support
 M:	Maxime Ripard <maxime.ripard@free-electrons.com>
+M:	Chen-Yu Tsai <wens@csie.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
-N:	sun[x4567]i
+N:	sun[x456789]i
 
 ARM/Allwinner SoC Clock Support
 M:	Emilio López <emilio@elopez.com.ar>