net/mlx5: Rename MLX5_PF page counter type to MLX5_SELF

net/mlx5: Rename MLX5_PF page counter type to MLX5_SELF

The MLX5_PF enum value in mlx5_func_type is used to track firmware
page allocations for the page manager function itself, which is either
the ECPF on SmartNIC systems or the host PF when there is no ECPF.

Rename it to MLX5_SELF to accurately reflect that this counter tracks
pages allocated by the manager for its own use, regardless of whether
it is a PF or ECPF.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260403090028.137783-2-tariqt@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>