Add WM8960 soundcard support

Signed-off-by: Devendra Tewari <devendra.tewari@gmail.com>

recipes-bsp/bootfiles/rpi-config_git.bb

@@ -30,6 +30,8 @@ GPIO_IR_TX ?= "17"
 
 CAN_OSCILLATOR ?= "16000000"
 
+WM8960="${@bb.utils.contains("MACHINE_FEATURES", "wm8960", "1", "0", d)}"
+
 inherit deploy nopackages
 
 do_deploy() {
@@ -251,6 +253,12 @@ do_deploy() {
                 ;;
         esac
     fi
+
+    # WM8960 support
+    if [ "${WM8960}" = "1" ]; then
+        echo "# Enable WM8960" >> $CONFIG
+        echo "dtoverlay=wm8960-soundcard" >> $CONFIG
+    fi
 }
 
 do_deploy_append_raspberrypi3-64() {