ARM: config: multi v7: Enable NVIDIA Tegra20 APB DMA driver

All Tegra20/30/114 serial and audio drivers depend on the Tegra20 APB DMA
driver, enable this DMA driver.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/configs/multi_v7_defconfig

@@ -958,6 +958,7 @@ CONFIG_ST_FDMA=m
 CONFIG_STM32_DMA=y
 CONFIG_STM32_DMAMUX=y
 CONFIG_STM32_MDMA=y
+CONFIG_TEGRA20_APB_DMA=y
 CONFIG_UNIPHIER_MDMAC=y
 CONFIG_XILINX_DMA=y
 CONFIG_QCOM_BAM_DMA=y