net: enetc: align v1 CBDR API with v4 for VF driver sharing

net: enetc: align v1 CBDR API with v4 for VF driver sharing

The upcoming ENETC v4 VF will share the enetc-vf driver with the v1 VF.
However, ENETC v4 introduces different CBDR (command BD ring) setup and
teardown semantics that are incompatible with v1.

To support both versions in the same driver, the .setup_cbdr() and
.teardown_cbdr() hooks will be added to struct enetc_si_ops, allowing
the driver to register version-specific implementations. So refactor the
v1 CBDR functions to match the v4-style interface (taking struct enetc_si*
instead of individual parameters), enabling them to be registered via
si_ops in the subsequent patch.

Changes:
- Update enetc_setup_cbdr() and enetc_teardown_cbdr() prototypes to
  take 'struct enetc_si *' as the sole parameter
- Extract parameters (dev, hw) from the enetc_si structure within the
  function implementations
- ENETC_CBDR_DEFAULT_SIZE has always been used as the number of command
  BDs, and there is no need to adjust the size of the command BD ring.
  Therefore, ENETC_CBDR_DEFAULT_SIZE is moved into the enetc_setup_cbdr()
- Update all call sites in enetc_pf.c and enetc_vf.c

No functional changes. This prepares for adding v4-specific CBDR handling
in subsequent patches.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20260522092438.1264020-9-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>