w83627hf: drop Scope(\_SB) from ASL include

w83627hf: drop Scope(\_SB) from ASL include

Drop explicit Scope(\_SB) from devtree.asl as it forces the SuperIO
to appear as child of the root device.
devtree.asl then needs to be included at a reasonable position inside
the \_SB device tree.

Change-Id: I72a57eddc5ec5f9763fdf789094a7be042758256
Signed-off-by: Christoph Grenz <christophg+cb@grenz-bonn.de>
Reviewed-on: http://review.coreboot.org/298
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>