Public bug reported:

[Impact]
The /sys/power/suspend_stats/total_hw_sleep desn't increase while suspended, 
because of the ASPM feature is not enabled on Realtek NIC.

[Fix]
Realtek provides 2 commits which are included in v6.15 to fix the issue

3d9b8ac53412 r8169: enable RTL8168H/RTL8168EP/RTL8168FP ASPM support
b48688ea3c9a r8169: disable RTL8126 ZRX-DC timeout

[Test]
1. check the value of /sys/power/suspend_stats/total_hw_sleep
2. suspend and resume the system
3. the value of /sys/power/suspend_stats/total_hw_sleep increases

[Where problems could occur]
Enable the ASPM on Realtek NIC sometimes lead to different abnormal behaviors.
We have done extensive tests on the target platform and make sure there is no 
issue introduced by the ASPM feature.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: linux-oem-6.14 (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu Noble)
     Importance: Undecided
         Status: Won't Fix

** Affects: linux-oem-6.14 (Ubuntu Noble)
     Importance: Undecided
     Assignee: AceLan Kao (acelankao)
         Status: In Progress

** Affects: linux (Ubuntu Questing)
     Importance: Undecided
         Status: Fix Released

** Affects: linux-oem-6.14 (Ubuntu Questing)
     Importance: Undecided
         Status: Invalid

** Also affects: linux-oem-6.14 (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-6.14 (Ubuntu Questing)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Noble)
       Status: New => Won't Fix

** Changed in: linux (Ubuntu Questing)
       Status: New => Fix Released

** Changed in: linux-oem-6.14 (Ubuntu Questing)
       Status: New => Invalid

** Changed in: linux-oem-6.14 (Ubuntu Noble)
       Status: New => In Progress

** Changed in: linux-oem-6.14 (Ubuntu Noble)
     Assignee: (unassigned) => AceLan Kao (acelankao)

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https://bugs.launchpad.net/bugs/2117115

Title:
  Enable Realtek RTL8168H/RTL8168EP/RTL8168FP ASPM support

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