hwmon: (pmbus) Add support for TI TPS40400 and TPS40422

TPS40400 and TPS40422 are supported by the generic PMBus driver.
Add device IDs and data sheet references.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/Documentation/hwmon/pmbus b/Documentation/hwmon/pmbus
index d28b591..c2b157b 100644
--- a/Documentation/hwmon/pmbus
+++ b/Documentation/hwmon/pmbus
@@ -22,6 +22,12 @@
 	http://www.lineagepower.com/oem/pdf/PDT006A0X.pdf
 	http://www.lineagepower.com/oem/pdf/PDT012A0X.pdf
 	http://www.lineagepower.com/oem/pdf/UDT020A0X.pdf
+  * Texas Instruments TPS40400, TPS40422
+    Prefixes: 'tps40400', 'tps40422'
+    Addresses scanned: -
+    Datasheets:
+	http://www.ti.com/lit/gpn/tps40400
+	http://www.ti.com/lit/gpn/tps40422
   * Generic PMBus devices
     Prefix: 'pmbus'
     Addresses scanned: -