pinctrl: renesas: Add RZ/A1 R7S72100 pin control driver

Add pin control 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/pinctrl/renesas/Kconfig b/drivers/pinctrl/renesas/Kconfig
index 152414c..0ffd7fc 100644
--- a/drivers/pinctrl/renesas/Kconfig
+++ b/drivers/pinctrl/renesas/Kconfig
@@ -3,6 +3,7 @@
 config PINCTRL_PFC
 	bool "Renesas pin control drivers"
 	depends on DM && ARCH_RMOBILE
+	default n if CPU_RZA1
 	help
 	  Enable support for clock present on Renesas RCar SoCs.
 
@@ -116,4 +117,15 @@
 	  the GPIO definitions and pin control functions for each available
 	  multiplex function.
 
+config PINCTRL_PFC_R7S72100
+	bool "Renesas RZ/A1 R7S72100 pin control driver"
+	depends on CPU_RZA1
+	default y if CPU_RZA1
+	help
+	  Support pin multiplexing control on Renesas RZ/A1 R7S72100 SoCs.
+
+	  The driver is controlled by a device tree node which contains both
+	  the GPIO definitions and pin control functions for each available
+	  multiplex function.
+
 endif