Every board file includes the same platform data definition
for the i2c-tegra driver's bus speed.  Move the platform data
into devices.c, and remove it from all the board files.
Signed-off-by: NColin Cross <ccross@android.com>
Tested-by: NKonstantin Sinyuk <kostyas@compulab.co.il>
Acked-by: NOlof Johansson <olof@lixom.net>