xsk: Use xsk_buff_pool directly for cq functions

xsk: Use xsk_buff_pool directly for cq functions

Currently xsk_cq_{reserve_addr,submit,cancel}_locked() take xdp_sock as
an input argument but it is only used for pulling out xsk_buff_pool
pointer from it.

Change mentioned functions to take pool pointer as an input argument to
avoid unnecessary dereferences.

Signed-off-by: Maciej Fijalkowski <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Magnus Karlsson <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]