Rename PT_NOTE namespace name used in AMDGPUPTNote.h

Patch by Guansong Zhang.

Differential Revision: https://reviews.llvm.org/D30750


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297498 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed