KVM: x86/pmu: Move the vmx_icl_pebs_cpu[] definition out of the header file

Defining a static const array in a header file would introduce redundant
definitions to the point of confusing semantics, and such a use case would
only bring complaints from the compiler:

arch/x86/kvm/pmu.h:20:32: warning: ‘vmx_icl_pebs_cpu’ defined but not used [-Wunused-const-variable=]
   20 | static const struct x86_cpu_id vmx_icl_pebs_cpu[] = {
      |                                ^~~~~~~~~~~~~~~~

Fixes: a095df2c5f48 ("KVM: x86/pmu: Adjust precise_ip to emulate Ice Lake guest PDIR counter")
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220518170118.66263-1-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>