[AMDGPU][NFC] Rename SIMCCodeEmitter.cpp to match the new emitter class name.

[kosarev]

Summary

The class was renamed in https://reviews.llvm.org/D154337.

[foad]

Thanks!

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCCodeEmitter.cpp

-//===-- SIMCCodeEmitter.cpp - SI Code Emitter -----------------------------===//
+//===-- AMDGPUMCCodeEmitter.cpp - AMDGPU Code Emitter ---------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 /// \file
-/// The SI code emitter produces machine code that can be executed
+/// The AMDGPU code emitter produces machine code that can be executed
 /// directly on the GPU device.
 //
 //===----------------------------------------------------------------------===//
 
 #include "MCTargetDesc/AMDGPUFixupKinds.h"
 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
 #include "SIDefines.h"
 #include "Utils/AMDGPUBaseInfo.h"

llvm/lib/Target/AMDGPU/MCTargetDesc/CMakeLists.txt

 add_llvm_component_library(LLVMAMDGPUDesc
   AMDGPUAsmBackend.cpp
   AMDGPUELFObjectWriter.cpp
   AMDGPUELFStreamer.cpp
   AMDGPUInstPrinter.cpp
   AMDGPUMCAsmInfo.cpp
+  AMDGPUMCCodeEmitter.cpp
   AMDGPUMCTargetDesc.cpp
   AMDGPUTargetStreamer.cpp
   R600InstPrinter.cpp
   R600MCCodeEmitter.cpp
   R600MCTargetDesc.cpp
-  SIMCCodeEmitter.cpp
 
   LINK_COMPONENTS
   AMDGPUInfo
   AMDGPUUtils
   BinaryFormat
   CodeGenTypes
   Core
   MC
   Support
   TargetParser
 
   ADD_TO_COMPONENT
   AMDGPU
   )
 
 add_dependencies(LLVMAMDGPUDesc LLVMAMDGPUUtils)