[llvm] [LoongArch] Add basic UEFI support (PR #154883)

[via llvm-commits]

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@@ -237,8 +237,9 @@ file_magic llvm::identify_magic(StringRef Magic) {
       return file_magic::minidump;
     break;
 
-  case 0x64: // x86-64 or ARM64 Windows.
-    if (Magic[1] == char(0x86) || Magic[1] == char(0xaa))
+  case 0x64: // x86-64 or ARM64 Windows or loongarch64.
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leecheechen wrote:

I've addressed the comments. Thank you for the feedback! 

https://github.com/llvm/llvm-project/pull/154883