arm64: Unbreak LINT build

Add the recently added options SOC_ROCKCHIP and device rk8xx.
While here add options SOC_ROCKCHIP_RK3568 and device rk808/rk817
which where never added.

Fixes: 48db612d8939 ("arm64: Add a new SOC_ROCKCHIP option")
Fixes: ad1bf74705e4 ("arm64: rockchip: Add a new rk8xx device")