[U-Boot] Issues with Rockchips make_fit_atf.py on master

[Peter Robinson]

Hi Kever,

There's a problem with generating the FIT image for rockchips on
recent 2018.05 RCs, errors below, I suspect due to changes in dtc.

Peter

/builddir/build/BUILD/u-boot-2018.05-rc2/"arch/arm/mach-rockchip/make_fit_atf.py"
\
arch/arm/dts/rk3399-firefly.dtb > u-boot.its
  ./tools/mkimage  -f u-boot.its -E u-boot.itb >/dev/null  && cat /dev/null
u-boot.itb.tmp: Warning (unit_address_vs_reg): Node /images/uboot at 1
has a unit name, but no reg property
u-boot.itb.tmp: Warning (unit_address_vs_reg): Node /images/atf at 1 has
a unit name, but no reg property
u-boot.itb.tmp: Warning (unit_address_vs_reg): Node /images/atf at 2 has
a unit name, but no reg property
u-boot.itb.tmp: Warning (unit_address_vs_reg): Node /images/atf at 3 has
a unit name, but no reg property
u-boot.itb.tmp: Warning (unit_address_vs_reg): Node /images/fdt at 1 has
a unit name, but no reg property
u-boot.itb.tmp: Warning (unit_address_vs_reg): Node
/configurations/config at 1 has a unit name, but no reg property
make[1]: Leaving directory
'/builddir/build/BUILD/u-boot-2018.05-rc2/builds/firefly-rk3399'