boards: shields: rk043fn66hs_ctg: add shield for rk043fn66hs_ctg

Add a shield for the RK043FN66HS-CTG panel, a Rocktech display panel with
an GT911 touch controller. This panel uses a 40+6 FPC interface for
parallel displays, which is supported by many NXP iMX RT EVKs.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>