dmaengine: fsl-edma: fix build error when arch is s390

fixed build error reported by kernel test robot.

>> s390-linux-ld: fsl-edma-main.c:(.text+0xf4c): undefined reference to `devm_platform_ioremap_resource'
   s390-linux-ld: drivers/dma/idma64.o: in function `idma64_platform_probe':

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306210131.zaHVasxz-lkp@intel.com/
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20230821161617.2142561-2-Frank.Li@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: nxpfrankli

drivers/dma/Kconfig

@@ -211,6 +211,7 @@ config FSL_DMA
 config FSL_EDMA
 	tristate "Freescale eDMA engine support"
 	depends on OF
+	depends on HAS_IOMEM
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help