docs: fix broken documentation links

Mostly due to x86 and acpi conversion, several documentation
links are still pointing to the old file. Fix them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Reviewed-by: Sven Van Asbroeck <TheSven73@gmail.com>
Reviewed-by: Bhupesh Sharma <bhsharma@redhat.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/firmware-guide/acpi/method-tracing.rst b/Documentation/firmware-guide/acpi/method-tracing.rst
index d0b077b..0aa7e2c 100644
--- a/Documentation/firmware-guide/acpi/method-tracing.rst
+++ b/Documentation/firmware-guide/acpi/method-tracing.rst
@@ -68,7 +68,7 @@
 
 Where:
    0xXXXXXXXX/0xYYYYYYYY
-     Refer to Documentation/acpi/debug.txt for possible debug layer/level
+     Refer to Documentation/firmware-guide/acpi/debug.rst for possible debug layer/level
      masking values.
    \PPPP.AAAA.TTTT.HHHH
      Full path of a control method that can be found in the ACPI namespace.