exynos5: Implement support for USB 3.0 DRD PHYs/controllers

This patch adds support for the DesignWare3 USB 3.0 DRD controller and
PHY to the Exynos5250 and Exynos5420 CPUs. It also adds code to the
Google Snow, Pit and Kirby boards to turn these controllers on where
applicable.

BUG=chrome-os-partner:21969
TEST=Manual

Change-Id: Idcca627363a69f1d65402e1acb9a62b439f077ff
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/169452
Reviewed-by: Stefan Reinauer <reinauer@google.com>
11 files changed