power_supply: Add cold to the POWER_SUPPLY_HEALTH report values

Some systems are able to report problems with batteries being under
temperature.

Signed-off-by: Mark Brown <[e-mail]>
Acked-by: Anton Vorontsov <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/power/power_supply_sysfs.c

···
 	};
 	static char *health_text[] = {
 		"Unknown", "Good", "Overheat", "Dead", "Over voltage",
-		"Unspecified failure"
+		"Unspecified failure", "Cold",
 	};
 	static char *technology_text[] = {
 		"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",

include/linux/power_supply.h

···
 	POWER_SUPPLY_HEALTH_DEAD,
 	POWER_SUPPLY_HEALTH_OVERVOLTAGE,
 	POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
+	POWER_SUPPLY_HEALTH_COLD,
 };
 
 enum {