mtd: spi-nor: spansion: Remove status polling on volatile registers write

Writing volatile registers are instant according to Cypress and do not
need any status polling. Remove status polling on volatile registers write.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20220420103427.47867-11-tudor.ambarus@microchip.com

drivers/mtd/spi-nor/spansion.c

@@ -57,10 +57,6 @@ static int cypress_nor_octal_dtr_en(struct spi_nor *nor)
 	if (ret)
 		return ret;
 
-	ret = spi_nor_wait_till_ready(nor);
-	if (ret)
-		return ret;
-
 	nor->read_dummy = 24;
 
 	/* Set the octal and DTR enable bits. */