Revert "Target/AMDGPU/AMDILIntrinsicInfo.cpp: Use llvm_unreachable() in nonreturn function, instead of assert(0)."
Revert "Target/AMDGPU/AMDILIntrinsicInfo.cpp: Use llvm_unreachable() in nonreturn function, instead of assert(0)."

This reverts commit 4ba4acc1bc2561b944a571edbb6a2dc78e357dfe.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@160296 91177308-0d34-0410-b5e6-96231b3b80d8

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