msm: ipa: Enable NAPI on IPA LAN CONS pipe

LAN RX optimization, change LAN RX data path bottom half
to run in softirq using NAPI. Also added an API for other
clients to see if we are using NAPI.

Change-Id: Iecd47f7412975b58786d81a5df3460de9aeffa21
Acked-by: Tal Gelbard <tgelbard@qti.qualcomm.com>
Signed-off-by: Bojun Pan <bojunp@codeaurora.org>
Signed-off-by: Amir Levy <alevy@codeaurora.org>