ARM: MX3: basic support for lilly-1131 board

This patch adds basic support for INCO startec's LILLY-1131 iMX31 based
modules. The module needs a baseboard support to work which will be
added in the next patch.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>