pinctrl: renesas: Fix R-Car Gen2 help text

The help text for Gen2 entries had a copy paste error, still containing
the Gen3 string, while the description was correctly listing Gen2. Fix
the help text.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>

drivers/pinctrl/renesas/Kconfig

@@ -15,31 +15,31 @@ config PINCTRL_PFC_R8A7790
 	bool "Renesas RCar Gen2 R8A7790 pin control driver"
 	depends on PINCTRL_PFC
 	help
-	  Support pin multiplexing control on Renesas RCar Gen3 R8A7790 SoCs.
+	  Support pin multiplexing control on Renesas RCar Gen2 R8A7790 SoCs.
 
 config PINCTRL_PFC_R8A7791
 	bool "Renesas RCar Gen2 R8A7791 pin control driver"
 	depends on PINCTRL_PFC
 	help
-	  Support pin multiplexing control on Renesas RCar Gen3 R8A7791 SoCs.
+	  Support pin multiplexing control on Renesas RCar Gen2 R8A7791 SoCs.
 
 config PINCTRL_PFC_R8A7792
 	bool "Renesas RCar Gen2 R8A7792 pin control driver"
 	depends on PINCTRL_PFC
 	help
-	  Support pin multiplexing control on Renesas RCar Gen3 R8A7792 SoCs.
+	  Support pin multiplexing control on Renesas RCar Gen2 R8A7792 SoCs.
 
 config PINCTRL_PFC_R8A7793
 	bool "Renesas RCar Gen2 R8A7793 pin control driver"
 	depends on PINCTRL_PFC
 	help
-	  Support pin multiplexing control on Renesas RCar Gen3 R8A7793 SoCs.
+	  Support pin multiplexing control on Renesas RCar Gen2 R8A7793 SoCs.
 
 config PINCTRL_PFC_R8A7794
 	bool "Renesas RCar Gen2 R8A7794 pin control driver"
 	depends on PINCTRL_PFC
 	help
-	  Support pin multiplexing control on Renesas RCar Gen3 R8A7794 SoCs.
+	  Support pin multiplexing control on Renesas RCar Gen2 R8A7794 SoCs.
 
 config PINCTRL_PFC_R8A774A1
         bool "Renesas RZ/G2 R8A774A1 pin control driver"