When running on a system that doesn't support HSMP (such as an APU)
then the following is observed:
```
/usr/include/c++/15.1.1/bits/stl_vector.h:1263: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = void*; _Alloc = std::allocator<void*>; reference = void*&; size_type = long unsigned int]: Assertion '__n < this->size()' failed.
```
This is because no "CPU" are detected on the SOC, which really means
no CPUs that support HSMP. Catch this case so that a clean return
can be passed up.
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
[ROCm/amdsmi commit: e5d9e1361e]
Mario Limonciello (AMD)
3b411b6759