MAINTAINERS: Add entry for kwbimage / kwboot tools

Add entry for these tools with Marek, Pali and Stefan as maintainers.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
diff --git a/MAINTAINERS b/MAINTAINERS
index 5a039b8..31b49c0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -775,6 +775,16 @@
 T:	git https://source.denx.de/u-boot/custodians/u-boot-i2c.git
 F:	drivers/i2c/
 
+KWBIMAGE / KWBOOT TOOLS
+M:	Pali Rohár <pali@kernel.org>
+M:	Marek Behún <marek.behun@nic.cz>
+M:	Stefan Roese <sr@denx.de>
+S:	Maintained
+T:	git https://source.denx.de/u-boot/custodians/u-boot-marvell.git
+F:	doc/README.kwbimage
+F:	doc/kwboot.1
+F:	tools/kwb*
+
 LOGGING
 M:	Simon Glass <sjg@chromium.org>
 S:	Maintained