arm64: defconfig: enable ARCH_ROCKCHIP

Enable building Rockchip support in the defconfig.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 4e17e7e..506b466 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -35,6 +35,7 @@
 CONFIG_ARCH_FSL_LS2085A=y
 CONFIG_ARCH_HISI=y
 CONFIG_ARCH_MEDIATEK=y
+CONFIG_ARCH_ROCKCHIP=y
 CONFIG_ARCH_SEATTLE=y
 CONFIG_ARCH_TEGRA=y
 CONFIG_ARCH_TEGRA_132_SOC=y
@@ -102,6 +103,7 @@
 CONFIG_LEGACY_PTY_COUNT=16
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
 CONFIG_SERIAL_8250_MT6577=y
 CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_SERIAL_AMBA_PL011_CONSOLE=y