Resubmitting after baselining with U-Boot USB 'next' branch.

This patch series adds Mentor Graphics USB OTG host controller driver support and MSC support for DM6446 (TI DaVinci) platform.

- [PATCH v2 1/6] usb : musb : Record speed of high speed devices connected to hub. - [PATCH v2 2/6] usb : musb : Adding host controller driver for Mentor USB controller. - [PATCH v2 3/6] usb : musb : Adding USB VBUS enable functionality for DM6446 DVEVM. - [PATCH v2 4/6] usb : musb : Adding DM6446 (TI DaVinci) platform specific USB support. - [PATCH v2 5/6] usb : musb : Enabling DM6446 (TI DaVinci) USB module power. - [PATCH v2 6/6] usb : musb : Enabling USB MSC support for DM6446 (TI DaVinci) platform.

Changes since v1:

- Rebased to U-Boot USB next branch - Removed high element from usb_device structure