arm64: defconfig: add Renesas R-Car DMAC driver support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/configs/defconfig

@@ -179,6 +179,7 @@ CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_EFI=y
 CONFIG_RTC_DRV_XGENE=y
 CONFIG_DMADEVICES=y
+CONFIG_RCAR_DMAC=y
 CONFIG_QCOM_BAM_DMA=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_BALLOON=y