gpio: cortina_gpio: add DM_GPIO driver for CAxxxx SoCs

DM_GPIO based GPIO controller driver for CAxxxx SoCs.
This driver support multiple CPU architectures and
Cortina Access SoC platforms.

Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Jason Li <jason.li@cortina-access.com>
Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 4e5a707..f751a8b 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -60,6 +60,14 @@
 	help
 	  This driver supports the GPIO banks on BCM6345 SoCs.
 
+config CORTINA_GPIO
+	bool "Cortina-Access GPIO driver"
+	depends on DM_GPIO && CORTINA_PLATFORM
+	help
+	  Enable support for the GPIO controller in Cortina CAxxxx SoCs.
+	  This driver supports all CPU ISA variants supported by Cortina
+	  Access CAxxxx SoCs.
+
 config DWAPB_GPIO
 	bool "DWAPB GPIO driver"
 	depends on DM && DM_GPIO