Adjust CONFIG_DEFAULT_DEVICE_TREE to pickup the mainline dtb

Signed-off-by: Rohan Garg <rohan.garg@collabora.com>
2 jobs for vendor/ci in 1 minute and 21 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
failed #12642
build

00:01:21

 
  Pack
skipped #12643
pack
 
Name Stage Failure
failed
build Build
  DTC     arch/arm/dts/rk3399-evb.dtb
DTC arch/arm/dts/rk3399-firefly.dtb
DTC arch/arm/dts/rk3399-puma-ddr1333.dtb
DTC arch/arm/dts/rk3399-puma-ddr1600.dtb
DTC arch/arm/dts/rk3399-puma-ddr1866.dtb
DTC arch/arm/dts/rv1108-evb.dtb
make: *** [dts/dt.dtb] Error 2
Makefile:876: recipe for target 'dts/dt.dtb' failed
ERROR: Job failed: exit code 1