dmaengine: tegra-apb: Support COMPILE_TEST

There is nothing arch-specific in the driver's code, so let's enable
compile-testing for the driver.
Signed-off-by: NDmitry Osipenko <digetx@gmail.com>
Acked-by: NJon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200209163356.6439-18-digetx@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

drivers/dma/Kconfig

@@ -617,7 +617,7 @@ config TXX9_DMAC
 
 config TEGRA20_APB_DMA
 	tristate "NVIDIA Tegra20 APB DMA support"
-	depends on ARCH_TEGRA
+	depends on ARCH_TEGRA || COMPILE_TEST
 	select DMA_ENGINE
 	help
 	  Support for the NVIDIA Tegra20 APB DMA controller driver. The