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/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 87f92a4..519bbd3 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -30,3 +30,4 @@
 obj-$(CONFIG_WDT_SP805) += sp805_wdt.o
 obj-$(CONFIG_WDT_STM32MP) += stm32mp_wdt.o
 obj-$(CONFIG_WDT_TANGIER) += tangier_wdt.o
+obj-$(CONFIG_WDT_XILINX) += xilinx_wwdt.o