Merge branch 'enic-use-page-pool-api-for-receiving-packets'

John Daley says:

====================
enic: Use Page Pool API for receiving packets

Use the Page Pool API for RX. The Page Pool API improves bandwidth and
CPU overhead by recycling pages instead of allocating new buffers in the
driver. Also, page pool fragment allocation for smaller MTUs is used
allow multiple packets to share pages.

RX code was moved to its own file and some refactoring was done
beforehand to make the page pool changes more trasparent and to simplify
the resulting code.
====================

Link: https://patch.msgid.link/20250205235416.25410-1-johndale@cisco.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>