Drop ice page splitting removal series from 6.18

"ice: drop page splitting and recycling" is an intermediate step towards the
Page Pool conversion, which 6.18 does not have. On its own it causes a large
performance regression on all ice devices (Alexander Lobakin's review of
6.18.57-rc1). Drop it together with the commits that depend on it.

Signed-off-by: Sasha Levin <sashal@kernel.org>