arm64: defconfig: Enable CONFIG_SND_AUDIO_GRAPH_CARD

CONFIG_SND_AUDIO_GRAPH_CARD is needed to use HDMI sound with video
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/configs/defconfig

@@ -440,6 +440,7 @@ CONFIG_SND_SOC_SAMSUNG=y
 CONFIG_SND_SOC_RCAR=m
 CONFIG_SND_SOC_AK4613=m
 CONFIG_SND_SIMPLE_CARD=m
+CONFIG_SND_AUDIO_GRAPH_CARD=m
 CONFIG_USB=y
 CONFIG_USB_OTG=y
 CONFIG_USB_XHCI_HCD=y