Add custom splashscreen, engicam.bmp support for Engicam i.CoreM6 qdl board. Cc: Anatolij Gustschin <agust@denx.de> Cc: Stefano Babic <sbabic@denx.de> Cc: Matteo Lisi <matteo.lisi@engicam.com> Cc: Michael Trimarchi <michael@amarulasolutions.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>