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

Writing volatile registers are instant according to Micron 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/20220420103427.47867-12-tudor.ambarus@microchip.com

drivers/mtd/spi-nor/micron-st.c

@@ -58,9 +58,6 @@ static int micron_st_nor_octal_dtr_en(struct spi_nor *nor)
 	op = (struct spi_mem_op)
 		MICRON_ST_NOR_WR_ANY_REG_OP(3, SPINOR_REG_MT_CFR1V, 1, buf);
 	ret = spi_nor_write_any_volatile_reg(nor, &op, nor->reg_proto);
-	if (ret)
-		return ret;
-	ret = spi_nor_wait_till_ready(nor);
 	if (ret)
 		return ret;