Revert "drm: add new drm_wait_on function to replace macro"

This reverts commit 6e860d08d0f5b1e9a2d711aaf9fd6b982aa8039e.

As I said not a good plan - this macro will have to stay for now,
trying to do the vbl code with the inline was a bit messy - may need specialised
drm wait on functions
2 files changed