We do this by putting them in the flattened device tree at setup time.
This required the flattened device tree blob to be made bigger.

Currenly we don't do anything with these.

Also make a function static.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>