Tegra2: input: Add tegra keyboard support.

Added Tegra keyboard driver sources. The driver will be enabled in a seperate commit.

Change-Id: I1aa49341af62c0927fa3051cad274ce9d2795eaa
Signed-off-by: Rakesh Iyer <riyer@nvidia.com>

BUG=None
TEST=Works well on seaboard.

Review URL: http://codereview.chromium.org/3548006
Patch from Rakesh Iyer <riyer@nvidia.com>.
5 files changed