arm64: tegra: Drop unit-address for audio card graph endpoints

Audio graph endpoints don't have a "reg" property, so they shouldn't
have a unit-address either.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts

@@ -1031,7 +1031,7 @@ i2s6_cif_ep: endpoint {
 						i2s6_port: port@1 {
 							reg = <1>;
 
-							i2s6_dap_ep: endpoint@0 {
+							i2s6_dap_ep: endpoint {
 								dai-format = "i2s";
 								/* Place holder for external Codec */
 							};

arch/arm64/boot/dts/nvidia/tegra194-p3509-0000.dtsi

@@ -989,7 +989,7 @@ i2s5_cif_ep: endpoint {
 						i2s5_port: port@1 {
 							reg = <1>;
 
-							i2s5_dap_ep: endpoint@0 {
+							i2s5_dap_ep: endpoint {
 								dai-format = "i2s";
 								/* Place holder for external Codec */
 							};

arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts

@@ -688,7 +688,7 @@ i2s4_cif_ep: endpoint {
 					i2s4_port: port@1 {
 						reg = <1>;
 
-						i2s4_dap_ep: endpoint@0 {
+						i2s4_dap_ep: endpoint {
 							dai-format = "i2s";
 							/* Placeholder for external Codec */
 						};
@@ -706,7 +706,7 @@ ports {
 					port@0 {
 						reg = <0>;
 
-						dmic1_cif_ep: endpoint@0 {
+						dmic1_cif_ep: endpoint {
 							remote-endpoint = <&xbar_dmic1_ep>;
 						};
 					};
@@ -714,7 +714,7 @@ dmic1_cif_ep: endpoint@0 {
 					dmic1_port: port@1 {
 						reg = <1>;
 
-						dmic1_dap_ep: endpoint@0 {
+						dmic1_dap_ep: endpoint {
 							/* Placeholder for external Codec */
 						};
 					};
@@ -731,7 +731,7 @@ ports {
 					port@0 {
 						reg = <0>;
 
-						dmic2_cif_ep: endpoint@0 {
+						dmic2_cif_ep: endpoint {
 							remote-endpoint = <&xbar_dmic2_ep>;
 						};
 					};
@@ -739,7 +739,7 @@ dmic2_cif_ep: endpoint@0 {
 					dmic2_port: port@1 {
 						reg = <1>;
 
-						dmic2_dap_ep: endpoint@0 {
+						dmic2_dap_ep: endpoint {
 							/* Placeholder for external Codec */
 						};
 					};