net/mlx5e: Remove unused 'xsk' param of mlx5e_build_xdpsq_param

net/mlx5e: Remove unused 'xsk' param of mlx5e_build_xdpsq_param

This was added in commit [1], but its only use removed in commit [2].
The parameter is unused, so remove it from the function parameter list.

[1] commit 9ded70fa1d81 ("net/mlx5e: Don't prefill WQEs in XDP SQ in the
multi buffer mode")
[2] commit 1a9304859b3a ("net/mlx5: XDP, Enable TX side XDP multi-buffer
support")
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>