ABI: testing: sysfs-class-power: clarify charge_type documentation

The existing docs here are a bit vague. This reformats and rewords it,
and is based upon the wording originally used by the dell-laptop driver
battery documentation and also sysfs-class-power-wilco.

The wording for "Long Life" and "Bypass" remain the same, because I'm
unfamiliar with hardware that use them.
Signed-off-by: Andres Salomon <dilinger@queued.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240820041942.30ed42f3@5400Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/ABI/testing/sysfs-class-power

@@ -377,17 +377,33 @@ What:		/sys/class/power_supply/<supply_name>/charge_type
 Date:		July 2009
 Contact:	linux-pm@vger.kernel.org
 Description:
-		Represents the type of charging currently being applied to the
-		battery. "Trickle", "Fast", and "Standard" all mean different
-		charging speeds. "Adaptive" means that the charger uses some
-		algorithm to adjust the charge rate dynamically, without
-		any user configuration required. "Custom" means that the charger
-		uses the charge_control_* properties as configuration for some
-		different algorithm. "Long Life" means the charger reduces its
-		charging rate in order to prolong the battery health. "Bypass"
-		means the charger bypasses the charging path around the
-		integrated converter allowing for a "smart" wall adaptor to
-		perform the power conversion externally.
+		Select the charging algorithm to use for a battery.
+
+		Standard:
+			Fully charge the battery at a moderate rate.
+		Fast:
+			Quickly charge the battery using fast-charge
+			technology. This is typically harder on the battery
+			than standard charging and may lower its lifespan.
+		Trickle:
+			Users who primarily operate the system while
+			plugged into an external power source can extend
+			battery life with this mode. Vendor tooling may
+			call this "Primarily AC Use".
+		Adaptive:
+			Automatically optimize battery charge rate based
+			on typical usage pattern.
+		Custom:
+			Use the charge_control_* properties to determine
+			when to start and stop charging. Advanced users
+			can use this to drastically extend battery life.
+		Long Life:
+			The charger reduces its charging rate in order to
+			prolong the battery health.
+		Bypass:
+			The charger bypasses the charging path around the
+			integrated converter allowing for a "smart" wall
+			adaptor to perform the power conversion externally.
 
 		Access: Read, Write