pinctrl: sh-pfc: Remove use of ARCH_R8A7796

CONFIG_ARCH_R8A7796 was renamed to CONFIG_ARCH_R8A77960 in commit
39e57e14 ("soc: renesas: Add ARCH_R8A77960 for existing R-Car
M3-W"), so its users can be removed.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20191211100308.6958-1-geert+renesas@glider.be

drivers/pinctrl/sh-pfc/Kconfig

@@ -27,7 +27,7 @@ config PINCTRL_SH_PFC
 	select PINCTRL_PFC_R8A7793 if ARCH_R8A7793
 	select PINCTRL_PFC_R8A7794 if ARCH_R8A7794
 	select PINCTRL_PFC_R8A7795 if ARCH_R8A7795
-	select PINCTRL_PFC_R8A77960 if ARCH_R8A77960 || ARCH_R8A7796
+	select PINCTRL_PFC_R8A77960 if ARCH_R8A77960
 	select PINCTRL_PFC_R8A77961 if ARCH_R8A77961
 	select PINCTRL_PFC_R8A77965 if ARCH_R8A77965
 	select PINCTRL_PFC_R8A77970 if ARCH_R8A77970