armv8: layerscape: Build u-boot-with-spl.bin for selected boards

armv8: layerscape: Build u-boot-with-spl.bin for selected boards

This patch reverts the changes made for ls1088a and ls2080a
based boards in commit d61233a854030 ("armv8: layerscape: Drop
u-boot-with-spl.bin for selected boards").

u-boot-with-spl.bin is required for Gen3 based SoC where internal
ROM copy data in the internal memory

CC: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
CC: Priyanka Jain <priyanka.jain@nxp.com>
CC: Pramod Kumar <pramod.kumar_1@nxp.com>
CC: Ashish Kumar <ashish.kumar@nxp.com>
CC: York Sun <york.sun@nxp.com>
Signed-off-by: Jagdish Gediya <jagdish.gediya@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>