Add SLIMpro I2C device driver on APM X-Gene platform. This I2C
device driver use the SLIMpro Mailbox driver to tunnel message to
the SLIMpro coprocessor to do the work of accessing I2C components.
Signed-off-by: NFeng Kan <fkan@apm.com>
Signed-off-by: NHieu Le <hnle@apm.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>