hwmon: (ibmpowernv) Add current(A) sensor

This patch exports current(A) sensors in inband sensors copied to
main memory by OCC.

Signed-off-by: Shilpasri G Bhat <[e-mail]>
Reviewed-by: Cédric Le Goater <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>

drivers/hwmon/ibmpowernv.c

···
 	TEMP,
 	POWER_SUPPLY,
 	POWER_INPUT,
+	CURRENT,
 	MAX_SENSOR_TYPE,
 };
 
···
 	{ "fan"   },
 	{ "temp"  },
 	{ "in"    },
-	{ "power" }
+	{ "power" },
+	{ "curr"  },
 };
 
 struct sensor_data {