mtd: nand: tango: Cleanup raw_write and raw_read

Drop raw_write return value (no longer used).
Drop raw_read  return value (for symmetry).

Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
1 file changed