net: phy: ax88796b: Replace hard-coded values with PHY_ID_MATCH_MODEL()

Use the PHY_ID_MATCH_MODEL() macro instead of hardcoding the values in
asix_driver[] and asix_tbl[].

In asix_tbl[], the macro also uses designated initializers instead of
positional initializers, which allows the struct fields to be reordered.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20250919103944.854845-2-thorsten.blum@linux.dev


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