AOSCOS: MIPS: add copyright headers back

In "FROMLIST: MIPS: Add syscall auditing support", a copyright header
was removed from arch/mips/include/uapi/asm/unistd.h with no proper
reason or related changes. Adding them back now.

Signed-off-by: Kexy Biscuit <[email protected]>

Author: KexyBiscuit

arch/mips/include/uapi/asm/unistd.h

@@ -6,6 +6,9 @@
  *
  * Copyright (C) 1995, 96, 97, 98, 99, 2000 by Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ *
+ * Changed system calls macros _syscall5 - _syscall7 to push args 5 to 7 onto
+ * the stack. Robin Farine for ACN S.A, Copyright (C) 1996 by ACN S.A
  */
 #ifndef _UAPI_ASM_UNISTD_H
 #define _UAPI_ASM_UNISTD_H