ice: access @pp through netmem_desc instead of page

ice: access @pp through netmem_desc instead of page

To eliminate the use of struct page in page pool, the page pool users
should use netmem descriptor and APIs instead.

Make ice driver access @pp through netmem_desc instead of page.

Signed-off-by: Byungchul Park <byungchul@sk.com>
Tested-by: Alexander Nowlin <alexander.nowlin@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260430-jk-iwl-net-next-2026-04-30-v1-12-6f27ae1cd073@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>