gpio: renesas: Add RZ/A1 R7S72100 GPIO driver

Add GPIO driver for RZ/A1 SoC. The IP is very different from the
R-Car Gen2/Gen3 one already present in the tree, hence a custom
driver.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 3be3250..7337153 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -27,6 +27,7 @@
 obj-$(CONFIG_PCA9698)		+= pca9698.o
 obj-$(CONFIG_ROCKCHIP_GPIO)	+= rk_gpio.o
 obj-$(CONFIG_RCAR_GPIO)		+= gpio-rcar.o
+obj-$(CONFIG_RZA1_GPIO)		+= gpio-rza1.o
 obj-$(CONFIG_S5P)		+= s5p_gpio.o
 obj-$(CONFIG_SANDBOX_GPIO)	+= sandbox.o
 obj-$(CONFIG_SPEAR_GPIO)	+= spear_gpio.o