qed/qede: Remove unused declarations

Commit 8cd160a2 ("qede: convert to new udp_tunnel_nic infra")
removed qede_udp_tunnel_{add,del}() but not the declarations.
Commit 0ebcebbe ("qed: Read device port count from the shmem")
removed qed_device_num_engines() but not its declaration.
Commit 1e128c81 ("qed: Add support for hardware offloaded FCoE.")
declared but never implemented qed_fcoe_set_pf_params().

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>