arm64: defconfig: enable R8A77980 SoC

Enable the Renesas R-Car V3H (R8A77980) SoC in the ARM64 defconfig.
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/configs/defconfig

@@ -52,6 +52,7 @@ CONFIG_ARCH_RENESAS=y
 CONFIG_ARCH_R8A7795=y
 CONFIG_ARCH_R8A7796=y
 CONFIG_ARCH_R8A77970=y
+CONFIG_ARCH_R8A77980=y
 CONFIG_ARCH_R8A77995=y
 CONFIG_ARCH_STRATIX10=y
 CONFIG_ARCH_TEGRA=y