net: microchip: Remove unused declarations

Commit 264a9c5c ("net: sparx5: Remove unused GLAG handling in PGID")
removed sparx5_pgid_alloc_glag() but not its declaration.
Commit 27d293cc ("net: microchip: sparx5: Add support for rule count by cookie")
removed vcap_rule_iter() but not its declaration.
Commit 8beef08f ("net: microchip: sparx5: Adding initial VCAP API support")
declared but never implemented vcap_api_set_client().

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230821135556.43224-1-yuehaibing@huawei.com


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