First batch of fixes intended for v5.5
* Don't send the PPAG command when PPAG is disabled, since it can
cause problems;
* A few fixes for a HW bug;
* A fix for RS offload;
* A fix for 3168 devices where the NVM tables where the wrong tables
were being read.
* Fix a couple of potential memory leaks in TXQ code;
* Disable L0S states in all hardware since our hardware doesn't
officially support them anymore (and older versions of the hardware
had instability in these states);
* Remove lar_disable parameter since it has been causing issues for
some people who erroneously disable it;
* Force the debug monitor HW to stop also when debug is disabled,
since it sometimes stays on and prevents low system power states;