dmaengine: dw: don't prompt for DW_DMAC_CORE

DW_DMAC_CORE is slected by PCI or Platform driver, so this symbol shouldn't
be user selectable, so remove the prompt

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/dw/Kconfig b/drivers/dma/dw/Kconfig
index dcfe964..36e02f0 100644
--- a/drivers/dma/dw/Kconfig
+++ b/drivers/dma/dw/Kconfig
@@ -3,7 +3,7 @@
 #
 
 config DW_DMAC_CORE
-	tristate "Synopsys DesignWare AHB DMA support"
+	tristate
 	select DMA_ENGINE
 
 config DW_DMAC