[MIPS] Replace __attribute_used__ with __used

Replaces the deprecated __attribute_used__ with __used.  Also makes some
style adjustments to abide by the kernel coding conventions.

Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index b947c61..b53f7ed 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -167,14 +167,14 @@
 }
 
 save_static_function(sys_fork);
-__attribute_used__ noinline static int
+static int __used noinline
 _sys_fork(nabi_no_regargs struct pt_regs regs)
 {
 	return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
 }
 
 save_static_function(sys_clone);
-__attribute_used__ noinline static int
+static int __used noinline
 _sys_clone(nabi_no_regargs struct pt_regs regs)
 {
 	unsigned long clone_flags;