[NFC] CapturePromotion: Use macro.

Keep to a single spelling for an "always OK" instruction.

Author: nate-chandler

lib/SILOptimizer/Mandatory/CapturePromotion.cpp

@@ -1072,10 +1072,9 @@ class NonEscapingUserVisitor
   ALWAYS_NON_ESCAPING_INST(DestroyValue)
   ALWAYS_NON_ESCAPING_INST(EndBorrow)
   ALWAYS_NON_ESCAPING_INST(DeallocBox)
+  ALWAYS_NON_ESCAPING_INST(EndAccess)
 #undef ALWAYS_NON_ESCAPING_INST
 
-  bool visitEndAccessInst(EndAccessInst *) { return true; }
-
   bool visitApplyInst(ApplyInst *ai) {
     auto argIndex = currentOp.get()->getOperandNumber() - 1;
     SILFunctionConventions substConv(ai->getSubstCalleeType(), ai->getModule());