laptops: move laptop-mode.txt to Documentation/laptops/

Move laptop-mode.txt into the laptops/ sub-directory to consolidate
laptop doc files there.

Update references to the file's location.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Documentation/00-INDEX

@@ -225,8 +225,6 @@ kprobes.txt
 	- documents the kernel probes debugging feature.
 kref.txt
 	- docs on adding reference counters (krefs) to kernel objects.
-laptop-mode.txt
-	- how to conserve battery power using laptop-mode.
 laptops/
 	- directory with laptop related info and laptop driver documentation.
 ldm.txt

Documentation/filesystems/proc.txt

@@ -1506,13 +1506,13 @@ laptop_mode
 -----------
 
 laptop_mode is a knob that controls "laptop mode". All the things that are
-controlled by this knob are discussed in Documentation/laptop-mode.txt.
+controlled by this knob are discussed in Documentation/laptops/laptop-mode.txt.
 
 block_dump
 ----------
 
 block_dump enables block I/O debugging when set to a nonzero value. More
-information on block I/O debugging is in Documentation/laptop-mode.txt.
+information on block I/O debugging is in Documentation/laptops/laptop-mode.txt.
 
 swap_token_timeout
 ------------------

Documentation/laptops/00-INDEX

@@ -2,6 +2,8 @@
 	- This file
 acer-wmi.txt
 	- information on the Acer Laptop WMI Extras driver.
+laptop-mode.txt
+	- how to conserve battery power using laptop-mode.
 sony-laptop.txt
 	- Sony Notebook Control Driver (SNC) Readme.
 sonypi.txt