mips: enable decoding of set_thread_area

* linux/dummy.h [MIPS]: Do not redirect sys_set_thread_area to printargs.
* mem.c [MIPS] (sys_set_thread_area): Define.
diff --git a/linux/dummy.h b/linux/dummy.h
index 95efa8a..2fc3498 100644
--- a/linux/dummy.h
+++ b/linux/dummy.h
@@ -47,7 +47,9 @@
 # define	sys_modify_ldt		printargs
 # ifndef M68K
 #  define	sys_get_thread_area	printargs
-#  define	sys_set_thread_area	printargs
+#  ifndef MIPS
+#   define	sys_set_thread_area	printargs
+#  endif
 # endif
 #endif
 
diff --git a/mem.c b/mem.c
index 9207fb2..4b6bc18 100644
--- a/mem.c
+++ b/mem.c
@@ -637,7 +637,7 @@
 }
 #endif /* I386 || X86_64 || X32 */
 
-#if defined(M68K)
+#if defined(M68K) || defined(MIPS)
 int
 sys_set_thread_area(struct tcb *tcp)
 {
@@ -646,7 +646,9 @@
 	return 0;
 
 }
+#endif
 
+#if defined(M68K)
 int
 sys_get_thread_area(struct tcb *tcp)
 {