mcx: support for HTKW mcx board

This patch adds support for the HTKW mcx AM3517-based board.
Serial, Ethernet, NAND, MMC, RTC, EHCI USB host and both
NAND and MMC SPLs are supported.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Tom Rini <tom.rini@gmail.com>
Cc: Detlev Zundel <dzu@denx.de>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/MAINTAINERS b/MAINTAINERS
index 852b802..c374b2b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -929,6 +929,10 @@
 
 	omap2420h4	ARM1136EJS
 
+Ilya Yanok <yanok@emcraft.com>
+
+	mcx		ARM ARMV7 (AM35x SoC)
+
 Syed Mohammed Khasim <sm.khasim@gmail.com>
 Sughosh Ganu <urwithsughosh@gmail.com>