[llvm-objdump] - Cleanup the code. NFCI.

This is a cosmetic cleanup for the llvm-objdump code.

This patch:
* Renames things to match the official LLVM code style (lower case -> upper case).
* Removes few obviously excessive variables.
* Moves a few lines closer to the place of use, reorders the code a bit to simplify it,
to avoid doing excessive returns and to avoid using 'else` after returns.

I focused only on a llvm-objdump.h/llvm-objdump.cpp files. Few changes in the
MachODump.cpp and COFFDump.cpp are a result of llvm-objdump.h modification.

Differential revision: https://reviews.llvm.org/D56637

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351171 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-objdump/llvm-objdump.h b/tools/llvm-objdump/llvm-objdump.h
index 44ef14d..fe2cb05 100644
--- a/tools/llvm-objdump/llvm-objdump.h
+++ b/tools/llvm-objdump/llvm-objdump.h
@@ -70,35 +70,35 @@
 
 // Various helper functions.
 void error(std::error_code ec);
-bool RelocAddressLess(object::RelocationRef a, object::RelocationRef b);
-void ParseInputMachO(StringRef Filename);
-void ParseInputMachO(object::MachOUniversalBinary *UB);
-void printCOFFUnwindInfo(const object::COFFObjectFile* o);
-void printMachOUnwindInfo(const object::MachOObjectFile* o);
-void printMachOExportsTrie(const object::MachOObjectFile* o);
-void printMachORebaseTable(object::MachOObjectFile* o);
-void printMachOBindTable(object::MachOObjectFile* o);
-void printMachOLazyBindTable(object::MachOObjectFile* o);
-void printMachOWeakBindTable(object::MachOObjectFile* o);
-void printELFFileHeader(const object::ObjectFile *o);
+bool isRelocAddressLess(object::RelocationRef A, object::RelocationRef B);
+void parseInputMachO(StringRef Filename);
+void parseInputMachO(object::MachOUniversalBinary *UB);
+void printCOFFUnwindInfo(const object::COFFObjectFile *O);
+void printMachOUnwindInfo(const object::MachOObjectFile *O);
+void printMachOExportsTrie(const object::MachOObjectFile *O);
+void printMachORebaseTable(object::MachOObjectFile *O);
+void printMachOBindTable(object::MachOObjectFile *O);
+void printMachOLazyBindTable(object::MachOObjectFile *O);
+void printMachOWeakBindTable(object::MachOObjectFile *O);
+void printELFFileHeader(const object::ObjectFile *O);
 void printELFDynamicSection(const object::ObjectFile *Obj);
-void printCOFFFileHeader(const object::ObjectFile *o);
-void printCOFFSymbolTable(const object::COFFImportFile *i);
-void printCOFFSymbolTable(const object::COFFObjectFile *o);
-void printMachOFileHeader(const object::ObjectFile *o);
-void printMachOLoadCommands(const object::ObjectFile *o);
-void printWasmFileHeader(const object::ObjectFile *o);
-void printExportsTrie(const object::ObjectFile *o);
-void printRebaseTable(object::ObjectFile *o);
-void printBindTable(object::ObjectFile *o);
-void printLazyBindTable(object::ObjectFile *o);
-void printWeakBindTable(object::ObjectFile *o);
-void printRawClangAST(const object::ObjectFile *o);
-void PrintRelocations(const object::ObjectFile *o);
-void PrintDynamicRelocations(const object::ObjectFile *o);
-void PrintSectionHeaders(const object::ObjectFile *o);
-void PrintSectionContents(const object::ObjectFile *o);
-void PrintSymbolTable(const object::ObjectFile *o, StringRef ArchiveName,
+void printCOFFFileHeader(const object::ObjectFile *O);
+void printCOFFSymbolTable(const object::COFFImportFile *I);
+void printCOFFSymbolTable(const object::COFFObjectFile *O);
+void printMachOFileHeader(const object::ObjectFile *O);
+void printMachOLoadCommands(const object::ObjectFile *O);
+void printWasmFileHeader(const object::ObjectFile *O);
+void printExportsTrie(const object::ObjectFile *O);
+void printRebaseTable(object::ObjectFile *O);
+void printBindTable(object::ObjectFile *O);
+void printLazyBindTable(object::ObjectFile *O);
+void printWeakBindTable(object::ObjectFile *O);
+void printRawClangAST(const object::ObjectFile *O);
+void printRelocations(const object::ObjectFile *O);
+void printDynamicRelocations(const object::ObjectFile *O);
+void printSectionHeaders(const object::ObjectFile *O);
+void printSectionContents(const object::ObjectFile *O);
+void printSymbolTable(const object::ObjectFile *O, StringRef ArchiveName,
                       StringRef ArchitectureName = StringRef());
 void warn(StringRef Message);
 LLVM_ATTRIBUTE_NORETURN void error(Twine Message);