dmaengine: zxdma: enable COMPILE_TEST

To get more coverage, enable COMPILE_TEST for this driver.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index b6116c8..674e685 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -560,7 +560,7 @@
 
 config ZX_DMA
 	tristate "ZTE ZX296702 DMA support"
-	depends on ARCH_ZX
+	depends on ARCH_ZX || COMPILE_TEST
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help