main: Actually add P8 kernel devicetree
main: Actually add P8 kernel devicetree

Commit b0cb4a00d6f7 ("main: Add P8 kernel devicetree") included a device-tree
for using the coldfire backend on POWER8 OpenBMC machines but it was not
properly merged. Add the correct device-tree.

Signed-off-by: Alistair Popple <e9adbcf81c8a36ccc628e09bc92d0e25e1c8e501@popple.id.au>

open-power/pdbg,open-power/pdbg,open-power/pdbg