[ia32] Replace c-style cast with brace initialization.

Bug: v8:10506
Change-Id: I896d0d614524bb9515593fb1fb2b1e3e9892a026
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2225938Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68122}

src/compiler/backend/ia32/code-generator-ia32.cc

@@ -3687,7 +3687,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
 
       // Out-of-range indices should return 0, add 112 so that any value > 15
       // saturates to 128 (top bit set), so pshufb will zero that lane.
-      __ Move(mask, (uint32_t)0x70707070);
+      __ Move(mask, uint32_t{0x70707070});
       __ Pshufd(mask, mask, 0x0);
       __ Paddusb(mask, i.InputSimd128Register(1));
       __ Pshufb(dst, mask);