[DAGCombiner] Rename variable to be slightly better. NFC

We were calling a load LN0 but it came from N0.getOperand(0) so its really more like LN00 if we follow the name used in other places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324561 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed