staging: Move ralink-gdma to its own directory

This is in preparation to allow it and the mt7621-dma drivers to be
built separately.  They are completely independent pieces of software,
and the Kconfig specifies very different requirements.

Cc: linux-kernel@vger.kernel.org
Cc: devel@driverdev.osuosl.org
Cc: Neil Brown <neil@brown.name>
Signed-off-by: George Hilliard <thirtythreeforty@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/Kconfig

@@ -112,6 +112,8 @@ source "drivers/staging/mt7621-spi/Kconfig"
 
 source "drivers/staging/mt7621-dma/Kconfig"
 
+source "drivers/staging/ralink-gdma/Kconfig"
+
 source "drivers/staging/mt7621-mmc/Kconfig"
 
 source "drivers/staging/mt7621-eth/Kconfig"

drivers/staging/Makefile

@@ -46,6 +46,7 @@ obj-$(CONFIG_SOC_MT7621)	+= mt7621-pci-phy/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-pinctrl/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-spi/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-dma/
+obj-$(CONFIG_SOC_MT7621)	+= ralink-gdma/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-mmc/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-eth/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-dts/

drivers/staging/mt7621-dma/Kconfig

-config DMA_RALINK
-	tristate "RALINK DMA support"
-	depends on RALINK && !SOC_RT288X
-	select DMA_ENGINE
-	select DMA_VIRTUAL_CHANNELS
-
 config MTK_HSDMA
 	tristate "MTK HSDMA support"
 	depends on RALINK && SOC_MT7621

drivers/staging/mt7621-dma/Makefile

-obj-$(CONFIG_DMA_RALINK) += ralink-gdma.o
 obj-$(CONFIG_MTK_HSDMA) += mtk-hsdma.o
 
 ccflags-y += -I$(srctree)/drivers/dma

drivers/staging/ralink-gdma/Kconfig

+config DMA_RALINK
+	tristate "RALINK DMA support"
+	depends on RALINK && !SOC_RT288X
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+

drivers/staging/ralink-gdma/Makefile

+obj-$(CONFIG_DMA_RALINK) += ralink-gdma.o
+
+ccflags-y += -I$(srctree)/drivers/dma