Add Reset Manager driver. This driver provides generic way to reset
and provides sysctl tunables for enable/disable FPGA<->HPS bridges.

Sponsored by:	DARPA, AFRL


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271431 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Merge upstream Clang rev 205331 debuginfo crash fix:

    Debug info: fix a crash when emitting IndirectFieldDecls, which were
    previously not handled at all.
    rdar://problem/16348575

MFC after:	1 week
Sponsored by:	DARPA, AFRL


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271432 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Add clang patch corresponding to r271432


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271433 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f