selftests: kvm: check dynamic bits against KVM_X86_XCOMP_GUEST_SUPP

mainline inclusion
from mainline-v5.17-rc2
commit b19c99b9
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5RQLJ


CVE: NA

Intel-SIG: commit b19c99b9 selftests: kvm: check dynamic bits
against KVM_X86_XCOMP_GUEST_SUPP.

--------------------------------
Provide coverage for the new API.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Lin Wang <lin.x.wang@intel.com>