of/fdt: fix argument name and add comments of unflatten_dt_node()
of/fdt: fix argument name and add comments of unflatten_dt_node()

Match the name of the third argument in the comment block
to the actual function: p -> poffset

Add missing comments about the arguments "nodepp" and "dryrun".

Signed-off-by: Masahiro Yamada <378b411a8a63ecc7605ec4272234862d7781c6ae@socionext.com>
Signed-off-by: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs