ARM64: dts: meson-axg: remove spdif out from gpio a7

Spdif out in not multiplexed on gpio A7 (spdif in is)
Remove this entry to fix the problem.

Fixes: 53c03b0aff36 ("ARM64: dts: meson-axg: add spdif output pins")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

@@ -575,13 +575,6 @@ mux {
 					};
 				};
 
-				spdif_out_a7_pins: spdif_out_a7 {
-					mux {
-						groups = "spdif_out_a7";
-						function = "spdif_out";
-					};
-				};
-
 				spdif_out_a11_pins: spdif_out_a11 {
 					mux {
 						groups = "spdif_out_a11";