asdk-repo-libdce

libdce[Android] - Use drm render node instead of card0

Render nodes allow a limited set of ioctls without restrictions.
libdce only needs to access drm to get buffers and render
node should be sufficient.

Note that this is new feature in the kernel.

Also, need a better way to open render node than to use hard coded
path name.

Change-Id: I8178414185dcaf6c70edc756eefb0a00b7e3c332
Signed-off-by: Hemant Hariyani <hemanthariyani@ti.com>