watchdog: cortina_wdt: add support for HW WDT on CAxxxx SoCs

Add support for hardware watchdog timer on all Cortina Access
CAxxxx family of SoCs.

Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Jason Li <jason.li@cortina-access.com>
Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 77354ad..36fbdce 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -107,6 +107,14 @@
 	   Select this to enable Cadence watchdog timer, which can be found on some
 	   Xilinx Microzed Platform.
 
+config WDT_CORTINA
+	bool "Cortina Access CAxxxx watchdog timer support"
+	depends on WDT
+	help
+	  Cortina Access CAxxxx watchdog timer support.
+	  This driver support all CPU ISAs supported by Cortina
+          Access CAxxxx SoCs.
+
 config WDT_MPC8xx
 	bool "MPC8xx watchdog timer support"
 	depends on WDT && MPC8xx