watchdog: Convert Xilinx Axi watchdog driver to driver model

Xilinx Axi wdt driver conversion to driver model & Kconfig update
for the same.

Signed-off-by: Shreenidhi Shedi <yesshedi@gmail.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 148c6a0..d545b3e 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -103,4 +103,12 @@
 	   Select this to enable Cadence watchdog timer, which can be found on some
 	   Xilinx Microzed Platform.
 
+config XILINX_TB_WATCHDOG
+	bool "Xilinx Axi watchdog timer support"
+	depends on WDT
+	imply WATCHDOG
+	help
+	   Select this to enable Xilinx Axi watchdog timer, which can be found on some
+	   Xilinx Microblaze Platforms.
+
 endmenu