net: ethernet: ti: Remove unused declarations

Commit e8609e69 ("net: ethernet: ti: am65-cpsw: Convert to PHYLINK")
removed am65_cpsw_nuss_adjust_link() but not its declaration.
Commit 84640e27 ("net: netcp: Add Keystone NetCP core ethernet driver")
declared but never implemented netcp_device_find_module().

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230821134029.40084-1-yuehaibing@huawei.com


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