Apply clang-tidy fixes for llvm-else-after-return in GPUToLLVMConversion.cpp (NFC)

Author: joker-eph

mlir/lib/Conversion/GPUCommon/GPUToLLVMConversion.cpp

@@ -814,7 +814,7 @@ LogicalResult ConvertAllocOpToGpuRuntimeCallPattern::matchAndRewrite(
   if (isShared && allocOp.getAsyncToken())
     return rewriter.notifyMatchFailure(
         allocOp, "Host Shared allocation cannot be done async");
-  else if (!isShared && failed(isAsyncWithOneDependency(rewriter, allocOp)))
+  if (!isShared && failed(isAsyncWithOneDependency(rewriter, allocOp)))
     return failure();
 
   // Get shape of the memref as values: static sizes are constant