ARM: tegra: Add device-tree for Xiaomi Mi Pad (A0101)

ARM: tegra: Add device-tree for Xiaomi Mi Pad (A0101)

The Mi Pad is a tablet computer based on Nvidia Tegra K1 SoC which
originally ran the Android operating system. The Mi Pad has a 7.9" IPS
display with 1536 x 2048 (324 ppi) resolution. 2 GB of RAM and 16/64 GB
of internal memory that can be supplemented with a microSDXC card giving
up to 128 GB of additional storage.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>