Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

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

bhnd(4): Fix resource allocation issues exposed by chipc PMU support.

- Delete all chipc children on attachment failure.
- Added missing bhnd_nexus bhnd_bus_deactivate_resource implementation.
- Drop a CHIPC_UNLOCK() accidentally left behind after lifting
synchronization into the chipc region refcounting API.
- Fix re-allocation of chipc resources. Previously, the resource ID was
reset to -1 on release, preventing later re-allocation.

Approved by: re (gjb), adrian (mentor)
Differential Revision: https://reviews.freebsd.org/D6849

Switch mips/sentry5 to bhnd(4), and unify with mips/broadcom

Now that bhnd(4) provides feature parity with the previous siba/mips
implementation, we can switch sentry5 over and begin lifting common
support code out for use across bhnd(4) embedded targets.

Changes:

- Fixed enumeration of siba(4) per-core address maps, required for
discovery of memory mapped chipc flash region on siba(4) devices.
- Simplified bhnd kernel configuration (dropped 'bhndbus' option).
- Replaced files.broadcom's direct file references with their
corresponding standard kernel options.
- Lifted out common bcma/siba nexus support, inheriting from the new
generic bhnd_nexus driver.
- Dropped now-unused sentry5 siba code.
- Re-integrated BCM into the universe build now that it actually compiles.

Approved by: adrian (mentor)
Differential Revision: https://reviews.freebsd.org/D6712