dma: Add driver for ADI SC5xx-family SoC MDMA functionality

Add a rudimentary MDMA driver for the Analog Devices SC5xx SoCs,
primarily intended for use with and tested against the QSPI/OSPI
IP included in the SoC.

Co-developed-by: Ian Roberts <ian.roberts@timesys.com>
Signed-off-by: Ian Roberts <ian.roberts@timesys.com>
Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Signed-off-by: Vasileios Bimpikas <vasileios.bimpikas@analog.com>
Signed-off-by: Utsav Agarwal <utsav.agarwal@analog.com>
Signed-off-by: Arturs Artamonovs <arturs.artamonovs@analog.com>
Signed-off-by: Greg Malysa <malysagreg@gmail.com>
Signed-off-by: Oliver Gaskell <Oliver.Gaskell@analog.com>
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 3c64e89..4b47be6 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -76,6 +76,13 @@
 	  this file is used as placeholder for driver. The main reason is
 	  to record compatible string and calling power domain driver.
 
+config ADI_DMA
+	bool "ADI DMA driver"
+	depends on DMA && DMA_CHANNELS
+	help
+	  Enable DMA support for Analog Devices SOCs, such as the SC5xx.
+	  Currently this is a minimalistic driver tested against OSPI use only.
+
 if APBH_DMA
 config APBH_DMA_BURST
 	bool "Enable DMA BURST"