irqchip: Kconfig: Update description for RENESAS_IRQC config

irq-renesas-irqc driver is also used on Renesas RZ/G{1,2} SoC's, update
the same to reflect the description for RENESAS_IRQC config.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Chris Paterson <Chris.Paterson2@renesas.com>
Link: https://lore.kernel.org/r/20200911100439.19878-1-prabhakar.mahadev-lad.rj@bp.renesas.com

drivers/irqchip/Kconfig

@@ -232,12 +232,12 @@ config RENESAS_INTC_IRQPIN
 	  interrupt pins, as found on SH/R-Mobile and R-Car Gen1 SoCs.
 
 config RENESAS_IRQC
-	bool "Renesas R-Mobile APE6 and R-Car IRQC support" if COMPILE_TEST
+	bool "Renesas R-Mobile APE6, R-Car Gen{2,3} and RZ/G{1,2} IRQC support" if COMPILE_TEST
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 	help
 	  Enable support for the Renesas Interrupt Controller for external
-	  devices, as found on R-Mobile APE6, R-Car Gen2, and R-Car Gen3 SoCs.
+	  devices, as found on R-Mobile APE6, R-Car Gen{2,3} and RZ/G{1,2} SoCs.
 
 config RENESAS_RZA1_IRQC
 	bool "Renesas RZ/A1 IRQC support" if COMPILE_TEST