EDAC/skx_common: Set the memory type correctly for HBM memory

Set the memory type to MEM_HBM2 if it's managed by the HBM2
memory controller.

Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20210720163009.GA1417532@agluck-desk2.amr.corp.intel.com