mtd: spi-nor: Add Winbond w25q128jv support

Datasheet:
http://www.winbond.com/resource-files/w25q128jv%20revf%2003272018%20plus.pdf



Testing done on Mikrotik Routerboard  wAP R board.
It does not support Dual or Quad modes.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>