docs: fix locations of several documents that got moved

The previous patch renamed several files that are cross-referenced
along the Kernel documentation. Adjust the links to point to
the right places.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/Documentation/admin-guide/braille-console.rst b/Documentation/admin-guide/braille-console.rst
index fa3702d..18e7933 100644
--- a/Documentation/admin-guide/braille-console.rst
+++ b/Documentation/admin-guide/braille-console.rst
@@ -3,7 +3,7 @@
 
 To get early boot messages on a braille device (before userspace screen
 readers can start), you first need to compile the support for the usual serial
-console (see :ref:`Documentation/serial-console.txt <serial_console>`), and
+console (see :ref:`Documentation/admin-guide/serial-console.rst <serial_console>`), and
 for braille device
 (in :menuselection:`Device Drivers --> Accessibility support --> Console on braille device`).
 
@@ -13,7 +13,7 @@
 	console=brl,serial_options...
 
 where ``serial_options...`` are the same as described in
-:ref:`Documentation/serial-console.txt <serial_console>`.
+:ref:`Documentation/admin-guide/serial-console.rst <serial_console>`.
 
 So for instance you can use ``console=brl,ttyS0`` if the braille device is connected to the first serial port, and ``console=brl,ttyS0,115200`` to
 override the baud rate to 115200, etc.
@@ -31,7 +31,7 @@
 For simplicity, only one braille console can be enabled, other uses of
 ``console=brl,...`` will be discarded.  Also note that it does not interfere with
 the console selection mechanism described in
-:ref:`Documentation/serial-console.txt <serial_console>`.
+:ref:`Documentation/admin-guide/serial-console.rst <serial_console>`.
 
 For now, only the VisioBraille device is supported.