removed mips_register_from_name() callback

add prefer_fastcall

[r14345]

ir/be/mips/bearch_mips.c

@@ -935,14 +935,6 @@ static ir_graph **mips_get_irg_list(const void *self, ir_graph ***irg_list) {
 	return NULL;
 }
 
-/**
- * Called by the frontend to encode a register name into a backend specific way
- */
-static unsigned mips_register_from_name(const char *regname) {
-	/* NYI */
-	return 0;
-}
-
 /**
  * Returns the libFirm configuration parameter for this backend.
  */
@@ -958,12 +950,12 @@ static const backend_params *mips_get_libfirm_params(void) {
 	static backend_params p = {
 		1,     /* need dword lowering */
 		0,     /* don't support inlien assembler yet */
+		0,     /* no different calling conventions */
 		NULL,  /* no additional opcodes */
 		NULL,  /* will be set later */
 		NULL,  /* but yet no creator function */
 		NULL,  /* context for create_intrinsic_fkt */
 		NULL,  /* no if conversion settings */
-		mips_register_from_name, /* register names */
 	};
 
 	p.dep_param = &ad;