arm64: defconfig: Enable R8A779A0 SoC

Enable the Renesas R-Car V3U (R8A779A0) SoC in the ARM64 defconfig.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201109115540.2415328-1-geert+renesas@glider.be

arch/arm64/configs/defconfig

@@ -953,6 +953,7 @@ CONFIG_ARCH_R8A77970=y
 CONFIG_ARCH_R8A77980=y
 CONFIG_ARCH_R8A77990=y
 CONFIG_ARCH_R8A77995=y
+CONFIG_ARCH_R8A779A0=y
 CONFIG_ROCKCHIP_PM_DOMAINS=y
 CONFIG_ARCH_TEGRA_132_SOC=y
 CONFIG_ARCH_TEGRA_210_SOC=y