msm: ipa: Fix lan polling to use max budget

Make changes to use the max budget of 64 for the LAN polling.
Otherwise we will switch between Polling and Interrupt mode
even when there is continuous data.

Change-Id: I6bbf49b77d258e88044c03a33fe20bb015a55019
Signed-off-by: Chaitanya Pratapa <cpratapa@codeaurora.org>