[llvm] AMDGPU: Move getMaxNumVectorRegs into GCNSubtarget (NFC) (PR #150889)

[Matt Arsenault via llvm-commits]

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@@ -537,6 +537,63 @@ unsigned GCNSubtarget::getMaxNumVGPRs(const MachineFunction &MF) const {
   return getMaxNumVGPRs(MF.getFunction());
 }
 
+std::pair<unsigned, unsigned>
+GCNSubtarget::getMaxNumVectorRegs(const Function &F) const {
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arsenm wrote:

Possibly 

https://github.com/llvm/llvm-project/pull/150889