Hey npatel@curtisswright.com,
I tried building the 'core-image-sato' for our own custom BSP (NXP based), too and ran into the same problem. The machine is based on i.MX8MM, but I think the solution will work for you, too.
In file 'poky/meta/recipes-graphics/packagegroups/packagegroup-core-x11-xserver.bb' under your source directory change line 14 from:
XSERVER ?= "xserver-xorg xf86-video-fbdev"
to
XSERVER = "xserver-xorg xf86-video-fbdev"
After this my build works, and the rootfile system builds. But I am wondering about some things:
1. Where gets XSERVER overwritten?
2. i.MX8MM should get the xf86-video-imx-vivante driver, because with FB there might be no graphics acceleration now.
3. If this image will work..... I will let you konw when I tested it.
Maybe someone from NXP can give further help here.
Kind Regards, Markus