[LOCAL] arm64: dts: renesas: salvator: use VC1 for CVBS

In order to test Virtual Channels use VC1 for CVBS input from the
adv748x. Note this is only for testing.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index 8e8ec30..8fed7b3 100644
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -41,7 +41,7 @@
 	};
 
 	chosen {
-		bootargs = "ignore_loglevel rw root=/dev/nfs ip=dhcp";
+		bootargs = "ignore_loglevel rw root=/dev/nfs ip=dhcp adv748x.txbvc=1";
 		stdout-path = "serial0:115200n8";
 	};