pinctrl: renesas: r8a7796: Add R8A77961 PFC support

R-Car M3-W+ (R8A77961) is pin compatible with R-Car M3-W (R8A77960),
which allows for both SoCs to share a driver.

Based on Linux commit 708c69e9eacc ("pinctrl: sh-pfc: r8a7796: Add
R8A77961 PFC support") and 74ce7a8044b0 ("pinctrl: renesas: r8a7796:
Optimize pinctrl image size for R8A774A1")

Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
diff --git a/arch/arm/mach-rmobile/Kconfig.64 b/arch/arm/mach-rmobile/Kconfig.64
index 248a9a8..3e73acc 100644
--- a/arch/arm/mach-rmobile/Kconfig.64
+++ b/arch/arm/mach-rmobile/Kconfig.64
@@ -37,6 +37,7 @@
 	select GICV2
 	imply CLK_R8A7796
 	imply PINCTRL_PFC_R8A77960
+	imply PINCTRL_PFC_R8A77961
 
 config R8A77965
 	bool "Renesas SoC R8A77965"