Compile error with GCC 11.1 on current master branch

The error seems self-explanatory (appears to have been introduced by https://github.com/intel/intel-graphics-compiler/commit/958e92b704f5f2351bfd5d78b1c1eea8f07a88e2):

```
IGC/VectorCompiler/lib/GenXCodeGen/GenXDebugInfo.cpp:708:25:
error: ordered comparison of pointer with integer zero (‘void*’ and ‘int’)
  708 |   if (GenDbgInfoDataPtr <= 0) {
      |       ~~~~~~~~~~~~~~~~~~^~~~
```