dma: Kconfig: Add TI_EDMA3 entry

Add TI_EDMA3 entry on Kconfig with help description.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 58cb6e9..1b92c77 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -12,4 +12,11 @@
 	  buses that is used to transfer data to and from memory.
 	  The uclass interface is defined in include/dma.h.
 
+config TI_EDMA3
+	bool "TI EDMA3 driver"
+	help
+	  Enable the TI EDMA3 driver for DRA7xx and AM43xx evms.
+	  This driver support data transfer between memory
+	  regions.
+
 endmenu # menu "DMA Support"