Backport the Linkstation poweroff driver from the kernel upstream (commit
a7f79f99541ef)
This driver is required by the Buffalo LinkStation LS421DE for a correct
power off operation. It also allows to use the WoL feature.
Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Signed-off-by: maurerr <mariusd84@gmail.com>
