EDAC/skx_common: Use topology_physical_package_id() instead of open coding

Use topology_physical_package_id() to get the CPU package ID instead of
open coding.

Suggested-by: Zhang Rui <[e-mail]>
Signed-off-by: Qiuxu Zhuo <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/edac/skx_common.c

···
  * Copyright (c) 2018, Intel Corporation.
  */
 
+#include <linux/topology.h>
 #include <linux/acpi.h>
 #include <linux/dmi.h>
 #include <linux/adxl.h>
···
 			struct cpuinfo_x86 *c = &cpu_data(cpu);
 
 			if (c->initialized && cpu_to_node(cpu) == node) {
-				*id = c->topo.pkg_id;
+				*id = topology_physical_package_id(cpu);
 				return 0;
 			}
 		}