hw/smbios: Fix core count in type4

hw/smbios: Fix core count in type4

>From SMBIOS 3.0 specification, core count field means:

Core Count is the number of cores detected by the BIOS for this
processor socket. [1]

Before 003f230e37d7 ("machine: Tweak the order of topology members in
struct CpuTopology"), MachineState.smp.cores means "the number of cores
in one package", and it's correct to use smp.cores for core count.

But 003f230e37d7 changes the smp.cores' meaning to "the number of cores
in one die" and doesn't change the original smp.cores' use in smbios as
well, which makes core count in type4 go wrong.

Fix this issue with the correct "cores per socket" caculation.

[1] SMBIOS 3.0.0, section 7.5.6, Processor Information - Core Count

Fixes: 003f230e37d7 ("machine: Tweak the order of topology members in struct CpuTopology")
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Message-Id: <20230628135437.1145805-5-zhao1.liu@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 196ea60a734c346d7d75f1d89aa37703d4d854e7)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>