hwmon: (lm90) Add support for GMT G781

GMT G781 is a ADM1032-compatible temperature sensor chip.
Add support to the LM90 driver.

Cc: Mike Gorchak <lestat@i.com.ua>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90
index 9cd14cfe..b466974 100644
--- a/Documentation/hwmon/lm90
+++ b/Documentation/hwmon/lm90
@@ -118,6 +118,10 @@
     Addresses scanned: I2C 0x48 through 0x4F
     Datasheet: Publicly available at NXP website
                http://ics.nxp.com/products/interface/datasheet/sa56004x.pdf
+  * GMT G781
+    Prefix: 'g781'
+    Addresses scanned: I2C 0x4c, 0x4d
+    Datasheet: Not publicly available from GMT
 
 Author: Jean Delvare <khali@linux-fr.org>