[PATCH 4/4] DMA: XILINX_ZYNQMP_DPDMA depends on HAS_IOMEM

[Randy Dunlap]

When CONFIG_HAS_IOMEM is not set/enabled, most iomap() family
functions [including ioremap(), devm_ioremap(), etc.] are not
available.
Drivers that use these functions should depend on HAS_IOMEM so that
they do not cause build errors.

Cures this build error:
s390-linux-ld: drivers/dma/xilinx/xilinx_dpdma.o: in function `xilinx_dpdma_probe':
xilinx_dpdma.c:(.text+0x336a): undefined reference to `devm_platform_ioremap_resource'

Fixes: 7cbb0c63de3fc ("dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driver")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Vinod Koul <vkoul@xxxxxxxxxx>
CC: dmaengine@xxxxxxxxxxxxxxx
Cc: Hyun Kwon <hyun.kwon@xxxxxxxxxx>
Cc: Tejas Upadhyay <tejasu@xxxxxxxxxx>
Cc: Michal Simek <michal.simek@xxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
 drivers/dma/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20210521.orig/drivers/dma/Kconfig
+++ linux-next-20210521/drivers/dma/Kconfig
@@ -702,6 +702,7 @@ config XILINX_ZYNQMP_DMA
 
 config XILINX_ZYNQMP_DPDMA
 	tristate "Xilinx DPDMA Engine"
+	depends on HAS_IOMEM
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help