x86: detect and initialize Cache Monitoring Technology feature

x86: detect and initialize Cache Monitoring Technology feature

Detect Cache Monitoring Technology(CMT) feature and enumerate the
resource types, one of which is to monitor the L3 cache occupancy.

Also introduce a Xen command line parameter to control the Platform
Shared Resource such as CMT.

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Release-Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>