hwmon: (nct7802) Add auto_point attributes

Introduced REG_PWM, pwm[1..3]_auto_point[1..5]_temp,
pwm[1..3]_auto_point[1..5]_pwm, nct7802_auto_point_attrs,
nct7802_auto_point_group, updated nct7802_regmap_is_volatile

Signed-off-by: Constantine Shulyupin <const@MakeLinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/Documentation/hwmon/nct7802 b/Documentation/hwmon/nct7802
index 2e00f5e..5438deb 100644
--- a/Documentation/hwmon/nct7802
+++ b/Documentation/hwmon/nct7802
@@ -17,8 +17,7 @@
 chip. NCT7802Y supports 6 temperature sensors, 5 voltage sensors, and 3 fan
 speed sensors.
 
-The chip also supports intelligent fan speed control. This functionality is
-not currently supported by the driver.
+Smart Fan™ speed control is available via pwmX_auto_point attributes.
 
 Tested Boards and BIOS Versions
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