Network: Modify IP properties to include NotAllowed error

There is no need to support IP properties update.
return NotAllowed error on update,we have done this through
https://gerrit.openbmc-project.xyz/c/openbmc/phosphor-networkd/+/22337

This commit is modify interface to handle errors

Signed-off-by: Ravi Teja <raviteja28031990@gmail.com>
Change-Id: I242f0a92696ab20f32bc66b662f86e5e2ffbf01e
1 file changed