[AArch64] Fix typo. NFC.

llvm-svn: 264408
diff --git a/llvm/lib/Target/AArch64/AArch64BranchRelaxation.cpp b/llvm/lib/Target/AArch64/AArch64BranchRelaxation.cpp
index a614f55..a72d6e5 100644
--- a/llvm/lib/Target/AArch64/AArch64BranchRelaxation.cpp
+++ b/llvm/lib/Target/AArch64/AArch64BranchRelaxation.cpp
@@ -513,8 +513,7 @@
   return MadeChange;
 }
 
-/// createAArch64BranchRelaxation - returns an instance of the constpool
-/// island pass.
+/// Returns an instance of the AArch64 Branch Relaxation pass.
 FunctionPass *llvm::createAArch64BranchRelaxation() {
   return new AArch64BranchRelaxation();
 }