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/Makefile b/drivers/pinctrl/renesas/Makefile
index 596b002..e8703f6 100644
--- a/drivers/pinctrl/renesas/Makefile
+++ b/drivers/pinctrl/renesas/Makefile
@@ -10,3 +10,4 @@
 obj-$(CONFIG_PINCTRL_PFC_R8A77970) += pfc-r8a77970.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77990) += pfc-r8a77990.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77995) += pfc-r8a77995.o
+obj-$(CONFIG_PINCTRL_PFC_R7S72100) += pfc-r7s72100.o