net: aquantia: Reduce default AQC IPA ring sizes to 128

Reduce default AQC ring sizes for IPA offload path since allocation of
large contiguous memory can sometimes fail during boot up.

CRs-Fixed: 2436744
Change-Id: I9dc503018dbb373a1c1f308b2dff83a88222f6a1
Signed-off-by: Jinesh K. Jayakumar <jineshk@codeaurora.org>