chore: Minor profile syntax cleanup, add summary

system_files/desktop/shared/usr/lib/tuned/balanced-no-pstate/tuned.conf

@@ -2,6 +2,7 @@
 # tuned configuration
 #
 [main]
+summary=General tuned profile for CPUs without p-state support
 
 [cpu]
 priority=10
@@ -19,6 +20,8 @@ timeout = 10
 radeon_powersave=dpm-balanced,auto
 
 [disk]
+# Comma separated list of devices, all devices if commented out.
+# devices=sda
 
 [scsi_host]
 alpm=medium_power