[MIPS] Wire up sync_file_range(2).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index c05ba05..4e36b87 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -635,6 +635,7 @@
 	sys	sys_ppoll		5
 	sys	sys_unshare		1
 	sys	sys_splice		4
+	sys	sys_sync_file_range	7	/* 4305 */
 	.endm
 
 	/* We pre-compute the number of _instruction_ bytes needed to