util: Add MBA capability information query to resctrl
util: Add MBA capability information query to resctrl

Introducing virResctrlInfoMemBW for the information memory bandwidth
allocation information.

Signed-off-by: Bing Niu <34467639bd6a847b4565e75ecae35c7ac3dc1b95@intel.com>
Reviewed-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>

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