Fix GETLLAR spin detection and restore default configuration as before #12523

[elad335]

Revert GETLLAR polling detection to be off (100 by default now) and the setting has been renamed to "SPU GETLLAR Busy Waiting Percentage", added a new setting with the old one's name "SPU Reservation Busy Waiting Percentage" which controls busy-waiting in reading SPU_RdEventStat channel (0 by default). Demon Souls needs GETLLAR to be 0 to have the results of pr #12523.

[elad335]

Relaxed default configuartions.

[solarmystic]

Almost completely restores performance back to pre #12523 levels, well done.

Testing with Persona 5

1. SPU Reservation Busy Waiting Percentage to 0 - 79 FPS
   

2. SPU Reservation Busy Waiting Percentage to 50 - 79 FPS
   

3. SPU Reservation Busy Waiting Percentage to 100 - 77 FPS
   

Previous master (14068) - 80 FPS

As a side note, overall CPU usage has been reduced in this PR for all 3 permutations of settings compared to the previous master, from 66% to 62-64% on average, depending on Busy Waiting Percentage set.

[solarmystic]

Seems to break performance in Ratchet and Clank Quest for Booty, according to Ramiro from the rpcs3 discord

https://cdn.discordapp.com/attachments/272035812277878785/1011173235808796693/unknown.png

https://discord.com/channels/272035812277878785/272035812277878785/1011173017692426262

[elad335]

Reset the settings!

[Danke-Boi]

Revert GETLLAR polling detection to be off (100 by default now) and the setting has been remaned to "SPU GETLLAR Busy Waiting Percentage", added a new setting with the old one's name "SPU Reservation Busy Waiting Percentage" which controls busy-waiting in reading SPU_RdEventStat channel (0 by default). Demon Souls needs GETLLAR to be 0 to have the results of pr #12523.

*renamed
feel free to delete this after it's fixed, just thought you might wanna know

[Nerboruto]

I tried the latest version of the optimization + fix and unfortunately I think that part of the performance increase has been lost .. the first versions were really smooth, in this build the improvement is less. however there is the bugfix.
UPDATE: sorry for the comment, I was misled by doing tests between the various versions. I had put getllar poll to 0 but I found it again at 100. my fault .. sorry

[kd-11]

Please avoid commenting on the PR, it just causes confusion since other changes already happened since this PR.
Create a fresh ticket showing the loss in performance so we can escalate the matter.