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/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
index 3488740..7d5161d 100644
--- a/drivers/hwmon/pmbus/pmbus.c
+++ b/drivers/hwmon/pmbus/pmbus.c
@@ -191,6 +191,8 @@
 	{"pdt006", 1},
 	{"pdt012", 1},
 	{"pmbus", 0},
+	{"tps40400", 1},
+	{"tps40422", 2},
 	{"udt020", 1},
 	{}
 };