[MLIR] Apply clang-tidy fixes for readability-identifier-naming in MemRefOps.cpp (NFC)

Author: joker-eph

mlir/lib/Dialect/MemRef/IR/MemRefOps.cpp

@@ -850,7 +850,7 @@ void CopyOp::getCanonicalizationPatterns(RewritePatternSet &results,
 /// If the source/target of a CopyOp is a CastOp that does not modify the shape
 /// and element type, the cast can be skipped. Such CastOps only cast the layout
 /// of the type.
-static LogicalResult FoldCopyOfCast(CopyOp op) {
+static LogicalResult foldCopyOfCast(CopyOp op) {
   for (OpOperand &operand : op->getOpOperands()) {
     auto castOp = operand.get().getDefiningOp<memref::CastOp>();
     if (castOp && memref::CastOp::canFoldIntoConsumerOp(castOp)) {
@@ -865,7 +865,7 @@ LogicalResult CopyOp::fold(FoldAdaptor adaptor,
                            SmallVectorImpl<OpFoldResult> &results) {
 
   /// copy(memrefcast) -> copy
-  return FoldCopyOfCast(*this);
+  return foldCopyOfCast(*this);
 }
 
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