make the kernel also output on ttyS0 and ask openfirmware to unfreeze the screen

SVN-Revision: 18216

target/linux/olpc/image/olpc.fth

@@ -1,4 +1,5 @@
 \ Boot script
 " u:\boot\vmlinuz" to boot-device
-" @CMDLINE@ noinitrd console=tty0" to boot-file
+" @CMDLINE@ noinitrd console=ttyS0,115200 console=tty0" to boot-file
+unfreeze
 boot