qemu: Create #define for TLS configuration setup.
qemu: Create #define for TLS configuration setup.

Create GET_CONFIG_TLS_CERT to set up the TLS for 'chardev' TLS setting.
Soon to be reused.

Signed-off-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>

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