[PATCH -next] dmaengine: dw-edma: Fix build error without CONFIG_PCI_MSI

[YueHaibing]

If CONFIG_PCI_MSI is not set, building with CONFIG_DW_EDMA
fails:

drivers/dma/dw-edma/dw-edma-core.c: In function dw_edma_irq_request:
drivers/dma/dw-edma/dw-edma-core.c:784:21: error: implicit declaration of function pci_irq_vector; did you mean rcu_irq_enter? [-Werror=implicit-function-declaration]
   err = request_irq(pci_irq_vector(to_pci_dev(dev), 0),
                     ^~~~~~~~~~~~~~

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/dma/dw-edma/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/dw-edma/Kconfig b/drivers/dma/dw-edma/Kconfig
index c0838ce..7ff17b2 100644
--- a/drivers/dma/dw-edma/Kconfig
+++ b/drivers/dma/dw-edma/Kconfig
@@ -2,6 +2,7 @@
 
 config DW_EDMA
 	tristate "Synopsys DesignWare eDMA controller driver"
+	depends on PCI && PCI_MSI
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help
-- 
2.7.4