ppc: fix mq_send

Add a similar fix as in 8dd85e041bdccf630c90e12ea044f55d28da9396.

Reported-By: Steven Seeger <steven.seeger@frontier.com>

libc/sysdeps/linux/powerpc/sysdep.h

@@ -258,11 +258,6 @@
   ENTRY (name)								      \
     DO_CALL (SYS_ify (syscall_name));
 
-#define PSEUDO_RET_ERRVAL						      \
-    blr
-#undef ret_ERRVAL
-#define ret_ERRVAL PSEUDO_RET_ERRVAL
-
 #undef	PSEUDO_END_ERRVAL
 #define	PSEUDO_END_ERRVAL(name)						      \
   END (name)