1.Wait until all pending transfers from the legacy controller are completed.
2.Disable the legacy linear controller. Set LQSPI_En [SPI_EN] = 0.
3.Configure the generic Quad-SPI controller.
4.Select the generic controller. Set LQSPI_CFG [LQ_MODE] = 0.
5.Enable the generic controller. Set GQSPI_En [GQSPI_EN] =1.
6.Use the generic controller.