news: Add entry describing support for Xen's max grant frames
news: Add entry describing support for Xen's max grant frames

Signed-off-by: Jim Fehlig <39929b5b86d72d51fceac59b52303e3fe8a3083e@suse.com>
Reviewed-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

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