rkpmic(4) on OpenBSD

The text 91606b2f7805, as OpenBSD 7.4, OpenBSD 7.3, OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9 shipped it.

Rockchip RK8xx Power Management IC

rkpmic(4) on OpenBSD now