mtd: spi-nor: Move Winbond bits out of core.c

Create a SPI NOR manufacturer driver for Winbond chips, and move the
Winbond definitions outside of core.c.

Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
4 files changed