FLASH_DMA_FIRST_DESC
[FLASH_DMA_FIRST_DESC] = 0x04,
[FLASH_DMA_FIRST_DESC] = 0x04,
[FLASH_DMA_FIRST_DESC] = 0x08,
flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC, lower_32_bits(desc));
(void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC);