ARC: HSDK: introduce CREG GPIO driver

The HSDK can manage some pins via CREG registers block.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 6240c39..2acb33b 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -80,6 +80,13 @@
 	help
 	  This driver supports i.MX7ULP Rapid GPIO2P controller.
 
+config HSDK_CREG_GPIO
+	bool "HSDK CREG GPIO griver"
+	depends on DM
+	default n
+	help
+	  This driver supports CREG GPIOs on Synopsys HSDK SOC.
+
 config LPC32XX_GPIO
 	bool "LPC32XX GPIO driver"
 	depends on DM