By definition this directory contains drivers that are specific to the
Rockchip architecture. All Kconfig options should therefore depend on
ARCH_ROCKCHIP to avoid exposing these symbols on other architectures.
For example, this options currently shows up as new when doing an
incremental build on PowerPC.
Signed-off-by: NThierry Reding <treding@nvidia.com>

[add COMPILE_TEST alternative condition]
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>