net: ethernet: ti: cpsw_ale: Remove obsolete macros

net: ethernet: ti: cpsw_ale: Remove obsolete macros

- ALE_VERSION_MAJOR/MINOR are no longer used following the transition to
  regmaps in commit bbfc7e2b9ebe ("net: ethernet: ti: cpsw_ale: use
  regfields for ALE registers")
- ALE_VERSION_IR3 is unused since entry mask bits are no longer
  hardcoded with commit b5d31f294027 ("net: ethernet: ti: ale: optimize
  ale entry mask bits configuartion")
- ALE_VERSION_IR4 has never been used since its introduction in commit
  ca47130a744b ("net: netcp: ale: update to support unknown vlan
  controls for NU switch")

Signed-off-by: Stefan Wiehler <stefan.wiehler@nokia.com>
Link: https://patch.msgid.link/20260114144425.3973272-1-stefan.wiehler@nokia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>