net/mlx5: fs, split bulk init

net/mlx5: fs, split bulk init

Refactor mlx5_fs_bulk_init() by moving bitmap allocation logic into a
new helper function mlx5_fs_bulk_bitmap_alloc(). This change does not
alter any logic.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1768210825-1598472-3-git-send-email-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>