GameDB: Enabled Single Core Mode for PSO EP1&2 and EP3 improving online stability

Data/Sys/GameSettings/GPO.ini

@@ -2,6 +2,7 @@
 
 [Core]
 # Values set here will override the main Dolphin settings.
+CPUThread = False
 
 [OnLoad]
 # Add memory patches to be loaded once on boot here.

Data/Sys/GameSettings/GPS.ini

@@ -2,6 +2,7 @@
 
 [Core]
 # Values set here will override the main Dolphin settings.
+CPUThread = False
 
 [OnLoad]
 # Add memory patches to be loaded once on boot here.