[turbofan] Remove architecture-specific linkage files and LinkageTraits. Use macro-assembler-define…

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 754c6ce9077858bcea14229279d58a9f4d340b96..ea66d748b8e3c09169a005a85b9a860983e6d406 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -13,6 +13,17 @@
 namespace v8 {
 namespace internal {
 
+// Give alias names to registers for calling conventions.
+const Register kReturnRegister0 = {kRegister_r0_Code};
+const Register kReturnRegister1 = {kRegister_r1_Code};
+const Register kJSFunctionRegister = {kRegister_r1_Code};
+const Register kContextRegister = {kRegister_r7_Code};
+const Register kInterpreterBytecodeOffsetRegister = {kRegister_r5_Code};
+const Register kInterpreterBytecodeArrayRegister = {kRegister_r6_Code};
+const Register kInterpreterDispatchTableRegister = {kRegister_r8_Code};
+const Register kRuntimeCallFunctionRegister = {kRegister_r1_Code};
+const Register kRuntimeCallArgCountRegister = {kRegister_r0_Code};
+
 // ----------------------------------------------------------------------------
 // Static helper functions
 
@@ -26,15 +37,6 @@ inline MemOperand FieldMemOperand(Register object, int offset) {
 const Register cp = { kRegister_r7_Code };  // JavaScript context pointer.
 const Register pp = { kRegister_r8_Code };  // Constant pool pointer.
 const Register kRootRegister = { kRegister_r10_Code };  // Roots array pointer.
-const Register kInterpreterBytecodeOffsetRegister = {
-    kRegister_r5_Code  // Interpreter bytecode offset.
-};
-const Register kInterpreterBytecodeArrayRegister = {
-    kRegister_r6_Code  // Interpreter bytecode array pointer.
-};
-const Register kInterpreterDispatchTableRegister = {
-    kRegister_r8_Code  // Interpreter dispatch table.
-};
 
 // Flags used for AllocateHeapNumber
 enum TaggingMode {