Documentation: Ask driver writers to provide PM support

Documentation: Ask driver writers to provide PM support

Add a paragraph in Documentation/SubmittingDrivers requesting that the
basic PM support be provided by new device drivers.

Add two new documents in Documentation/power/ giving general instructions
on debugging the suspend/resume functionality and testing the suspend and
resume support in device drivers.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: David Brownell <[email protected]>
Cc: Nigel Cunningham <[email protected]>
Cc: Alan Cox <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>