usb: musb: Kconfig: Select the DMA driver if DMA mode of MUSB is enabled

AM335x MUSB supports both PIO and DMA mode. When DMA mode is
selected users need to explicitly enable the DMA driver. To avoid the
extra configuration select the DMA driver if DMA mode is set for AM335x MUSB.
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/Kconfig

@@ -141,6 +141,7 @@ config USB_TI_CPPI_DMA
 config USB_TI_CPPI41_DMA
 	bool 'TI CPPI 4.1 (AM335x)'
 	depends on ARCH_OMAP
+	select TI_CPPI41
 
 config USB_TUSB_OMAP_DMA
 	bool 'TUSB 6010'