Register an nvmem device to expose the 3 scratch registers (total of 12
bytes) to both userspace and kernel space.
Reviewed-by: NSekhar Nori <nsekhar@ti.com>
Tested-by: NKeerthy <j-keerthy@ti.com>
Reviewed-by: NKeerthy <j-keerthy@ti.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>