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

Fix a copyright glitch before it gets copy-pasted again. I think this must
have started as collateral damage in a global search-replace, then it got
copied around when I cloned a file to begin creating a new file.

Allow callers of OF_decode_addr to get the size of the found mapping. This
will allow for code that uses the old fdt_get_range and fdt_regsize
functions to find a range, map it, access, then unmap to replace this, up
to and including the map, with a call to OF_decode_addr.

As this function should only be used in the early boot code the unmap is
mostly do document we no longer need the mapping as it's a no-op, at least
on arm.

Reviewed by: jhibbits
Sponsored by: ABT Systems Ltd
Differential Revision: https://reviews.freebsd.org/D5258

Add a mips implementation of OF_decode_addr().