Factor out common part from ASUS Eee Pad Transformer TF101 device tree
into tegra20-asus-transformer-common.dtsi and add device tree fragment for
ASUS Eee Pad Slider SL101.
Tested-by: Winona Schroeer-Smith <wolfizen@wolfizen.net> # ASUS SL101
Tested-by: Antoni Aloy Torrens <aaloytorrens@gmail.com> # ASUS TF101
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>