When configfs support is added the values in question will have to be
used in two different places. Substitute them with defined constants
to avoid duplicating magic numbers.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>