media: cec: documentation fixes

Various references to open() et al were wrong. Fix this so following
the link will get you to the correct place.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/cec/cec-func-close.rst

@@ -40,7 +40,7 @@ freed. The device configuration remain unchanged.
 Return Value
 ============
 
-:c:func:`close()` returns 0 on success. On error, -1 is returned, and
+:c:func:`close() <cec-close>` returns 0 on success. On error, -1 is returned, and
 ``errno`` is set appropriately. Possible error codes are:
 
 ``EBADF``

Documentation/media/uapi/cec/cec-func-ioctl.rst

@@ -39,7 +39,7 @@ Arguments
 Description
 ===========
 
-The :c:func:`ioctl()` function manipulates cec device parameters. The
+The :c:func:`ioctl() <cec-ioctl>` function manipulates cec device parameters. The
 argument ``fd`` must be an open file descriptor.
 
 The ioctl ``request`` code specifies the cec function to be called. It

Documentation/media/uapi/cec/cec-func-open.rst

@@ -46,7 +46,7 @@ Arguments
 Description
 ===========
 
-To open a cec device applications call :c:func:`open()` with the
+To open a cec device applications call :c:func:`open() <cec-open>` with the
 desired device name. The function has no side effects; the device
 configuration remain unchanged.
 
@@ -58,7 +58,7 @@ EBADF.
 Return Value
 ============
 
-:c:func:`open()` returns the new file descriptor on success. On error,
+:c:func:`open() <cec-open>` returns the new file descriptor on success. On error,
 -1 is returned, and ``errno`` is set appropriately. Possible error codes
 include:
 

Documentation/media/uapi/cec/cec-func-poll.rst

@@ -39,10 +39,10 @@ Arguments
 Description
 ===========
 
-With the :c:func:`poll()` function applications can wait for CEC
+With the :c:func:`poll() <cec-poll>` function applications can wait for CEC
 events.
 
-On success :c:func:`poll()` returns the number of file descriptors
+On success :c:func:`poll() <cec-poll>` returns the number of file descriptors
 that have been selected (that is, file descriptors for which the
 ``revents`` field of the respective struct :c:type:`pollfd`
 is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in
@@ -53,13 +53,13 @@ then the ``POLLPRI`` flag is set. When the function times out it returns
 a value of zero, on failure it returns -1 and the ``errno`` variable is
 set appropriately.
 
-For more details see the :c:func:`poll()` manual page.
+For more details see the :c:func:`poll() <cec-poll>` manual page.
 
 
 Return Value
 ============
 
-On success, :c:func:`poll()` returns the number structures which have
+On success, :c:func:`poll() <cec-poll>` returns the number structures which have
 non-zero ``revents`` fields, or zero if the call timed out. On error -1
 is returned, and the ``errno`` variable is set appropriately:
 

Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst

@@ -21,7 +21,7 @@ Arguments
 =========
 
 ``fd``
-    File descriptor returned by :ref:`open() <cec-func-open>`.
+    File descriptor returned by :c:func:`open() <cec-open>`.
 
 ``argp``
 

Documentation/media/uapi/cec/cec-ioc-dqevent.rst

@@ -22,7 +22,7 @@ Arguments
 =========
 
 ``fd``
-    File descriptor returned by :ref:`open() <cec-func-open>`.
+    File descriptor returned by :c:func:`open() <cec-open>`.
 
 ``argp``