OMAP3: BeagleBoard: Enable pullups on i2c2.

This allows the reading of EEPROMS on the expansion bus without adding
external pull-ups.

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Steve Kipisz <s-kipisz2@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>