[CVE-2009-0029] Rename old_readdir to sys_old_readdir

This way it matches the generic system call name convention.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index d0916a5..51d1ba4 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -398,7 +398,7 @@
 	sys	sys_uselib		1
 	sys	sys_swapon		2
 	sys	sys_reboot		3
-	sys	old_readdir		3
+	sys	sys_old_readdir		3
 	sys	old_mmap		6	/* 4090 */
 	sys	sys_munmap		2
 	sys	sys_truncate		2