net/mlx5e: SHAMPO, Drop info array

The info array is used to store a pointer to the
dma address of the header and to the frag page. However,
this array is not really required:
- The frag page can be calculated from the header index
  frag page index = header index / headers per page.
- The dma address can be calculated through a formula:
  dma page address + header offset.

This series gets rid of the info array and uses the above
formulas instead.

The current_page_index was used in conjunction with the info array to
store page fragment indices. This variable is dropped as well.

There was no performance regression observed.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241107194357.683732-12-tariqt@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>