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mtd: spi-nor: mark desirable switch case fall through
gcc 7 with -Wimplicit-fallthrough raises:
drivers/mtd/spi-nor/spi-nor.c: In function ‘set_4byte’:
drivers/mtd/spi-nor/spi-nor.c:289:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
need_wren = true;
~~~~~~~~~~^~~~~~
drivers/mtd/spi-nor/spi-nor.c:290:2: note: here
case SNOR_MFR_MACRONIX:
^~~~
Quiet the warning by marking the expected switch fall through.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>