Fix logic around AMD/Intel cases.
Fix logic around AMD/Intel cases.

If the support is Ignored, then the call is still executed. We
simply rely on it to fall through to the int3. Therefore, we
must also bail on the vendor check.

PiperOrigin-RevId: 292620558

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor