KVM: selftests: Use uapi header to get VMX and SVM exit reasons/codes

Include the vmx.h and svm.h uapi headers that KVM so kindly provides
instead of manually defining all the same exit reasons/code.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20220830231614.3580124-26-seanjc@google.com


Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>