[AMDGPU][NFC] Remove redundant condition

[baloghadamsoftware]

Summary

Condition LiteralCount is checked both in an outer and in an inner if statement in SIInstrInfo::verifyInstruction(). This patch removes the redundant inner check.

The issue was found using clang-tidy check under review misc-redundant-condition. See https://reviews.llvm.org/D81272.

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

if (Desc.getOpcode() != AMDGPU::V_WRITELANE_B32
     // vsrc0 can be sgpr, const or m0 and lane select sgpr, m0 or inline-const
     if (ConstantBusCount > ST.getConstantBusLimit(Opcode) &&
         Opcode != AMDGPU::V_WRITELANE_B32) {
       ErrInfo = "VOP* instruction violates constant bus restriction";
       return false;
     }
 
     if (isVOP3(MI) && LiteralCount) {
-      if (LiteralCount && !ST.hasVOP3Literal()) {
+      if (!ST.hasVOP3Literal()) {
         ErrInfo = "VOP3 instruction uses literal";
         return false;
       }
       if (LiteralCount > 1) {
         ErrInfo = "VOP3 instruction uses more than one literal";
         return false;
       }
     }