use /etc/preinit on atheros-2.6

SVN-Revision: 6452

target/linux/atheros-2.6/files/arch/mips/atheros/prom.c

@@ -34,7 +34,7 @@ void __init prom_init(void)
 	DO_AR5312(ar5312_prom_init();)
 	DO_AR5315(ar5315_prom_init();)
 
-	strcpy(arcs_cmdline, "console=ttyS0,9600 rootfstype=squashfs,jffs2");
+	strcpy(arcs_cmdline, "console=ttyS0,9600 rootfstype=squashfs,jffs2 init=/etc/preinit");
 }
 
 void __init prom_free_prom_memory(void)