relax MAX_JOBS restriction for ROCm builds (#38425)
Summary:
CC ezyang xw285cornell sunway513
Forcing MAX_JOBS=4 was done 2 years ago. We have tested up to MAX_JOBS=256. OOM issues are no longer observed.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38425
Differential Revision: D21566747
Pulled By: ezyang
fbshipit-source-id: f7f50e44a287268f1b06bcea3cb4e11c80260cc3
