net: mana: Use page pool fragments for RX buffers instead of full pages to improve memory efficiency (5.15)

[John Cabaj]

SRU Justification

[Impact]

* Microsoft requested patch to improve RX buffer handling in MANA driver. Previously reverted as part of LP: #2131828, this patch looks to reintroduce the proper functionality with added fix.

[Fix]

* Jammy: backports of the following patches:
  - 1705341485ff: "net: mana: Improve mana_set_channels() in low mem conditions" upstream
  - 730ff06d3f5c: "net: mana: Use page pool fragments for RX buffers instead of full pages to improve memory efficiency." from linux-next

[Test Plan]

* Compile tested
* Microsoft tested

[Regression potential]

* Changes are localized to MANA. Possible regressions could result in unexpected behavior of MANA driver.

[Other info]

* SF#00416936
* SF#00422364

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-azure/5.15.0-1103.112 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-azure' to 'verification-done-jammy-linux-azure'. If the problem still exists, change the tag 'verification-needed-jammy-linux-azure' to 'verification-failed-jammy-linux-azure'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!