Defer the iomem extent initialization until the MMU is enabled. This is necessary since the last pmap changes, to get proper serial console initialization. From NetBSD, tested by nick@
Defer the iomem extent initialization until the MMU is enabled. This is
necessary since the last pmap changes, to get proper serial console
initialization.
From NetBSD, tested by nick@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars