ARM: dts: dra72-evm-common: Add aliases for audio cards

For the card ordering to work we need to have aliases for the sound cards.
After this patch:
card0 - analog audio card
card1 - HDMI audio

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

arch/arm/boot/dts/dra72-evm-common.dtsi

@@ -16,6 +16,9 @@
 
 	aliases {
 		display0 = &hdmi0;
+
+		sound0 = &sound0;
+		sound1 = &hdmi;
 	};
 
 	chosen {