improved boot message

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
added comment about I2C bus(ses)

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
disabled some OMAP3 only features for OMAP4 compile

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>