Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Import Annapurna Labs Alpine HAL to sys/contrib/

Import from vendor-sys/alpine-hal/2.7
SVN rev.: 285432
HAL version: 2.7

Obtained from: Semihalf
Sponsored by: Annapurna Labs

Tag alpine-hal 2.7

Introduce Annapurna Labs HAL for Alpine PoC

This commit adds HAL (Hardware Abstraction Layer) code
for Alpine Platform on Chip from Annapurna Labs.
Only published files are included.

HAL version: 2.7

Obtained from: Semihalf
Sponsored by: Annapurna Labs