imx6sololiteevk: use zImage
U-Boot, with the default environment, is looking for a zImage.
Signed-off-by: Georges Savoundararadj <savoundg@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>