docs: hwmon: Add an index file and rename docs to *.rst

Now that all files were converted to ReST format, rename them
and add an index.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

include/linux/platform_data/ads7828.h

@@ -4,7 +4,7 @@
  * Copyright (c) 2012 Savoir-faire Linux Inc.
  *          Vivien Didelot <vivien.didelot@savoirfairelinux.com>
  *
- * For further information, see the Documentation/hwmon/ads7828 file.
+ * For further information, see the Documentation/hwmon/ads7828.rst file.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as

include/linux/platform_data/ds620.h

@@ -14,7 +14,7 @@ struct ds620_platform_data {
 	 *  1 = PO_LOW
 	 *  2 = PO_HIGH
 	 *
-	 * (see Documentation/hwmon/ds620)
+	 * (see Documentation/hwmon/ds620.rst)
 	 */
 	int pomode;
 };

include/linux/platform_data/ina2xx.h

@@ -7,7 +7,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * For further information, see the Documentation/hwmon/ina2xx file.
+ * For further information, see the Documentation/hwmon/ina2xx.rst file.
  */
 
 /**

include/linux/platform_data/max197.h

@@ -8,7 +8,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * For further information, see the Documentation/hwmon/max197 file.
+ * For further information, see the Documentation/hwmon/max197.rst file.
  */
 
 #ifndef _PDATA_MAX197_H

include/linux/platform_data/ntc_thermistor.h

@@ -42,7 +42,7 @@ struct ntc_thermistor_platform_data {
 	 * read_uV()
 	 *
 	 * How to setup pullup_ohm, pulldown_ohm, and connect is
-	 * described at Documentation/hwmon/ntc_thermistor
+	 * described at Documentation/hwmon/ntc_thermistor.rst
 	 *
 	 * pullup/down_ohm: 0 for infinite / not-connected
 	 *