ncsi: return command response from sendOemCommand

Rather than expecting the response to be handled from the command
callback, return it as the return value from sendOemCommand().

This addresses the todo in the sendOemCommand implementation.

Change-Id: I144128f50341d4ff7d8e248cb4dfa1427ead515b
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
3 files changed