watchdog: versal: Add support for Xilinx window watchdog

Add support for Xilinx window watchdog, which can be found on
Versal platforms.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index b50652b..d8d420f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -447,6 +447,7 @@
 S:	Maintained
 T:	git https://gitlab.denx.de/u-boot/custodians/u-boot-microblaze.git
 F:	arch/arm/mach-versal/
+F:	drivers/watchdog/xilinx_wwdt.c
 N:	(?<!uni)versal
 
 ARM VERSATILE EXPRESS DRIVERS