conf: hostdev: Introduce virDomainHostdevSubsysSCSIClear
conf: hostdev: Introduce virDomainHostdevSubsysSCSIClear

Just a tiny wrapper over the SCSI def clearing logic to drop some
if-else branches from a switch, mainly because extending the switch in
the future would render the current code with branching less readable.

Signed-off-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

libvirt/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,crobinso/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,andreabolognani/libvirt,datto/libvirt,zippy2/libvirt,andreabolognani/libvirt,jardasgit/libvirt,eskultety/libvirt,nertpinx/libvirt,crobinso/libvirt,libvirt/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,zippy2/libvirt,datto/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,nertpinx/libvirt,eskultety/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,eskultety/libvirt,crobinso/libvirt,datto/libvirt,fabianfreyer/libvirt,eskultety/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,olafhering/libvirt,olafhering/libvirt,fabianfreyer/libvirt,olafhering/libvirt,olafhering/libvirt,datto/libvirt,libvirt/libvirt,crobinso/libvirt,zippy2/libvirt,eskultety/libvirt,zippy2/libvirt,jardasgit/libvirt,jardasgit/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,datto/libvirt,libvirt/libvirt