hwmon/smsc47m192: Document the LPC47M292 as supported

The new SMSC LPC47M292 Super-I/O chip includes a hardware monitoring
block which is compatible with those of the LPC47M192.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Hartmut Rick <linux@rick.claranet.de>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 6d105a1..68ee970 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -437,7 +437,8 @@
 	select HWMON_VID
 	help
 	  If you say yes here you get support for the temperature and
-	  voltage sensors of the SMSC LPC47M192 and LPC47M997 chips.
+	  voltage sensors of the SMSC LPC47M192, LPC47M15x, LPC47M292
+	  and LPC47M997 chips.
 
 	  The fan monitoring and control capabilities of these chips
 	  are supported by another driver, select