[llvm] [NVPTX] Address warning and typo in fp128 support (PR #136207)

[Kazu Hirata via llvm-commits]

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@@ -125,8 +125,7 @@ class LLVM_LIBRARY_VISIBILITY NVPTXAsmPrinter : public AsmPrinter {
     }
 
     void addZeros(unsigned Num) {
-      for (unsigned _ : llvm::seq(Num)) {
-        (void)_;
+      for ([[maybe_unused]] unsigned _ : llvm::seq(Num)) {
         addByte(0);
       }
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kazutakahirata wrote:

nit: Could you remove the curly braces that I added?  Thanks!

https://github.com/llvm/llvm-project/pull/136207