Since udev 174 udev has been running input_id as a built-in command and
setting this value in the environment for touchscreens. Use this logic
to detect when to make a touchscreen0 symlink.
(From OE-Core rev: 5abcfcd4380aacafc45d776f557738fb18089113)
Signed-off-by: Tom Rini <trini@ti.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>