msm: ipa: pass napi struct from rmnet_ipa

Instead of passing events from IPA driver to Rmnet IPA
to control napi operations, Rmnet_IPA passes the napi
struct to IPA driver and IPA driver controls it directly.
This allows flexibility to call any napi APIs from IPA driver.

Change-Id: I3bd82cb6ad28b7663b8209c32f855ddb62e16e52
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>