sensors-detect: Add detection of NCT6681D, NCT6682D, and NCT6683D

NCT6683D is found on recent Intel mainboards (eg DH87MC, DH87RL).
NCT6681D is mentioned on the Nuvoton web site. NCT6682D is similar
to NCT6681D with added support for current monitoring.

CHANGES

@@ -7,6 +7,7 @@ SVN HEAD
                   Use modules.builtin instead of /sys/module
                   Handle built-in modules properly
                   Add detection of NCT6791D
+                  Add detection of NCT6681D, NCT6682D, and NCT6683D
 
 3.3.4 (2013-05-27)
   sensors.conf.5: Mention "sensors -u" to get the raw feature names

prog/detect/sensors-detect

@@ -2030,6 +2030,13 @@ use constant FEAT_SMBUS	=> (1 << 7);
 		devid_mask => 0xFFF0,
 		logdev => 0x0b,
 		features => FEAT_IN | FEAT_FAN | FEAT_TEMP,
+	}, {
+		name => "Nuvoton NCT6681D/NCT6682D eSIO",
+		driver => "to-be-written",
+		devid => 0xB270,
+		devid_mask => 0xFFF0,
+		logdev => 0x0b,
+		features => FEAT_IN | FEAT_FAN | FEAT_TEMP,
 	}, {
 		name => "Nuvoton W83667HG-B (NCT5571D) Super IO Sensors",
 		driver => "w83627ehf",
@@ -2062,6 +2069,13 @@ use constant FEAT_SMBUS	=> (1 << 7);
 		devid_mask => 0xFFF0,
 		logdev => 0x0b,
 		features => FEAT_IN | FEAT_FAN | FEAT_TEMP,
+	}, {
+		name => "Nuvoton NCT6683D eSIO",
+		driver => "to-be-written",
+		devid => 0xC730,
+		devid_mask => 0xFFF0,
+		logdev => 0x0b,
+		features => FEAT_IN | FEAT_FAN | FEAT_TEMP,
 	}, {
 		name => "Nuvoton NCT6791D Super IO Sensors",
 		driver => "nct6775",