msm: ipa: Add dummy API to check if NAPI LAN rx is enabled

For clients who use IPA LAN rx data path we added our API
to see if we have NAPI enabled. This feature is only enabled
in later versions of the kernel but the API is to support it
moving forward.

Change-Id: I6cdac1d2aa01fc28916a6adad8ecfc8a2bcc7b65
Acked-by: Tal Gelbard <tgelbard@qti.qualcomm.com>
Signed-off-by: Amir Levy <alevy@codeaurora.org>