ARM: tegra114: add device tree for roth (SHIELD)

Add roth's device tree along with pinmux, regulators, and devices
supported by the kernel.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
ARM: tegra114: add device tree for Tegra Note 7

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
[HACK] mmc: do not expose rpmb partitions

Some user-spaces (e.g. OpenSUSE 13.1) try to read them and get errors.
Need to figure out who is to blame here.
[HACK] init clocks
[HACK] Keep blink clock enabled

This clock is used by the wifi chip.
Add README.md

Display some information about this branch on Github.