[media] doc-rst: add documentation for LIRC_SET_MEASURE_CARRIER_MODE

Place documentation for this ioctl on its own page.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/rc/lirc-set-measure-carrier-mode.rst

+.. -*- coding: utf-8; mode: rst -*-
+
+.. _lirc_set_measure_carrier_mode:
+
+***********************************
+ioctl LIRC_SET_MEASURE_CARRIER_MODE
+***********************************
+
+Name
+====
+
+LIRC_SET_MEASURE_CARRIER_MODE - enable or disable measure mode
+
+Synopsis
+========
+
+.. cpp:function:: int ioctl( int fd, int request, __u32 *enable )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``request``
+    LIRC_SET_MEASURE_CARRIER_MODE
+
+``enable``
+    enable = 1 means enable measure mode, enable = 0 means disable measure
+    mode.
+
+
+Description
+===========
+
+.. _lirc-mode2-frequency:
+
+Enable or disable measure mode. If enabled, from the next key
+press on, the driver will send ``LIRC_MODE2_FREQUENCY`` packets. By
+default this should be turned off.
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.

Documentation/media/uapi/rc/lirc_device_interface.rst

@@ -25,4 +25,5 @@ LIRC Device Interface
     lirc-set-send-carrier
     lirc-set-transmitter-mask
     lirc-set-rec-timeout-reports
+    lirc-set-measure-carrier-mode
     lirc_ioctl

Documentation/media/uapi/rc/lirc_ioctl.rst

@@ -54,15 +54,6 @@ device can rely on working with the default settings initially.
     Set send/receive mode. Largely obsolete for send, as only
     ``LIRC_MODE_PULSE`` is supported.
 
-.. _LIRC_SET_MEASURE_CARRIER_MODE:
-.. _lirc-mode2-frequency:
-
-``LIRC_SET_MEASURE_CARRIER_MODE``
-
-    Enable (1)/disable (0) measure mode. If enabled, from the next key
-    press on, the driver will send ``LIRC_MODE2_FREQUENCY`` packets. By
-    default this should be turned off.
-
 .. _LIRC_SET_WIDEBAND_RECEIVER:
 
 ``LIRC_SET_WIDEBAND_RECEIVER``