This commits fixes a issue where RDNA1 GPUs with the HIP backend in
Cycles would render some scenes incorrectly.
This is done by setting the optimization level for RDNA1 GPUs to `O1`
for RDNA1 GPUs when compiling HIP kernels on Windows.
Pull Request: https://projects.blender.org/blender/blender/pulls/137421
Alaska
40587d2781