ARM: add drivers for Colibri T30 to multi_v7_defconfig

ARM: add drivers for Colibri T30 to multi_v7_defconfig

Toradex Colibri Evaluation Board uses the DS1307 RTC and the
MCP251x CAN controller. The NVIDIA Tegra 3 based Colibri T30
module can be used on this carrier board, hence enable those
drivers in tegra_defonfig and multi_v7_defconfig.

Furthermore the NVIDIA Tegra 3 based Apalis T30 module too
contains two MCP251x CAN controller.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>