msm: ipa: Add support for per client lan statistics

Per client lan statistics  feature requires fetching data
from IPA Q6 and share it with user space application.
Make changes to provide ioctl-interface to interact with
IPA Q6 to get the per client lan statistics.

Change-Id: If0af747cd86058eaa275170f42af1d9e93e81768
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Utkarsh Saxena <usaxena@codeaurora.org>