[Driver] Remove remnant PowerPC Darwin code

Continue the work started at https://reviews.llvm.org/D50989

Author: MaskRay

clang/lib/Driver/ToolChains/Darwin.cpp

@@ -53,9 +53,6 @@ llvm::Triple::ArchType darwin::getArchTypeForMachOArchName(StringRef Str) {
   // translation.
 
   return llvm::StringSwitch<llvm::Triple::ArchType>(Str)
-      .Cases("ppc", "ppc601", "ppc603", "ppc604", "ppc604e", llvm::Triple::ppc)
-      .Cases("ppc750", "ppc7400", "ppc7450", "ppc970", llvm::Triple::ppc)
-      .Case("ppc64", llvm::Triple::ppc64)
       .Cases("i386", "i486", "i486SX", "i586", "i686", llvm::Triple::x86)
       .Cases("pentium", "pentpro", "pentIIm3", "pentIIm5", "pentium4",
              llvm::Triple::x86)

clang/test/Driver/bindings.c

@@ -12,7 +12,7 @@
 // RUN: %clang -target i386-unknown-unknown -ccc-print-bindings -fsyntax-only -x c++ %s 2>&1 | FileCheck %s --check-prefix=CHECK08
 // CHECK08: "clang", inputs: ["{{.*}}bindings.c"], output: (nothing)
 
-// RUN: %clang -target i386-apple-darwin11 -ccc-print-bindings %s -S -arch ppc 2>&1 | FileCheck %s --check-prefix=CHECK11
+// RUN: %clang -target i386-apple-darwin11 -ccc-print-bindings %s -S -arch arm 2>&1 | FileCheck %s --check-prefix=CHECK11
 // CHECK11: "clang", inputs: ["{{.*}}bindings.c"], output: "bindings.s"
 
 // RUN: %clang -target powerpc-unknown-unknown -ccc-print-bindings %s -S 2>&1 | FileCheck %s --check-prefix=CHECK12

clang/test/Driver/phases.c

@@ -28,25 +28,25 @@
 // BASIC: 25: linker, {4, 9, 14, 16, 19, 24}, image
 
 // Universal linked image.
-// RUN: %clang -target i386-apple-darwin9 -ccc-print-phases -x c %s -arch ppc -arch i386 2>&1 | FileCheck -check-prefix=ULI %s
+// RUN: %clang -target i386-apple-darwin9 -ccc-print-phases -x c %s -arch arm -arch i386 2>&1 | FileCheck -check-prefix=ULI %s
 // ULI: 0: input, "{{.*}}phases.c", c
 // ULI: 1: preprocessor, {0}, cpp-output
 // ULI: 2: compiler, {1}, ir
 // ULI: 3: backend, {2}, assembler
 // ULI: 4: assembler, {3}, object
 // ULI: 5: linker, {4}, image
-// ULI: 6: bind-arch, "ppc", {5}, image
+// ULI: 6: bind-arch, "arm", {5}, image
 // ULI: 7: bind-arch, "i386", {5}, image
 // ULI: 8: lipo, {6, 7}, image
 
 // Universal object file.
-// RUN: %clang -target i386-apple-darwin9 -ccc-print-phases -c -x c %s -arch ppc -arch i386 2>&1 | FileCheck -check-prefix=UOF %s
+// RUN: %clang -target i386-apple-darwin9 -ccc-print-phases -c -x c %s -arch arm -arch i386 2>&1 | FileCheck -check-prefix=UOF %s
 // UOF: 0: input, "{{.*}}phases.c", c
 // UOF: 1: preprocessor, {0}, cpp-output
 // UOF: 2: compiler, {1}, ir
 // UOF: 3: backend, {2}, assembler
 // UOF: 4: assembler, {3}, object
-// UOF: 5: bind-arch, "ppc", {4}, object
+// UOF: 5: bind-arch, "arm", {4}, object
 // UOF: 6: bind-arch, "i386", {4}, object
 // UOF: 7: lipo, {5, 6}, object