tashaboot: console base from the devicetree

The uart address was the last board hardcode. The console
probe now walks the dtb for the pl011 node and reads its
first reg pair before the first print, the same walker the
gic lookup uses. The qemu default remains as the dev path
fallback for a tree without the node.

receipt: banner and every print on the dtb base, full boot to
the busybox shell, four cpus.

0 files changed, 0 insertions, 0 deletions