Revert "[CodeGen] Fix register pressure computation in MachinePipeliner (#87030)"

This reverts commit a4dec9d
because the test failed in the following builder:
https://luci-milo.appspot.com/ui/p/fuchsia/builders/prod/clang-linux-x64/b8751864477467126481/overview

Author: gulfemsavrun

llvm/lib/CodeGen/MachinePipeliner.cpp

@@ -1268,7 +1268,7 @@ class HighRegisterPressureDetector {
   // Calculate the upper limit of each pressure set
   void computePressureSetLimit(const RegisterClassInfo &RCI) {
     for (unsigned PSet = 0; PSet < PSetNum; PSet++)
-      PressureSetLimit[PSet] = TRI->getRegPressureSetLimit(MF, PSet);
+      PressureSetLimit[PSet] = RCI.getRegPressureSetLimit(PSet);
 
     // We assume fixed registers, such as stack pointer, are already in use.
     // Therefore subtracting the weight of the fixed registers from the limit of