mako: Fix the using deprecated syntax in init.mako.usb.rc

init: using deprecated syntax for specifying property 'sys.usb.config',
      use ${name} instead

Change-Id: Ie7a2f74a9a3985e1190d5202aaf84751b37fb200
diff --git a/init.mako.usb.rc b/init.mako.usb.rc
index 37b040d..5e3ed09 100644
--- a/init.mako.usb.rc
+++ b/init.mako.usb.rc
@@ -34,7 +34,7 @@
     write /sys/class/android_usb/android0/bDeviceProtocol 0
     write /sys/class/android_usb/android0/functions mtp
     write /sys/class/android_usb/android0/enable 1
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 on property:sys.usb.config=mtp,adb
     write /sys/class/android_usb/android0/enable 0
@@ -46,7 +46,7 @@
     write /sys/class/android_usb/android0/functions mtp,adb
     write /sys/class/android_usb/android0/enable 1
     start adbd
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 # rndis
 on property:sys.usb.config=rndis
@@ -59,7 +59,7 @@
     write /sys/class/android_usb/android0/bDeviceProtocol 1
     write /sys/class/android_usb/android0/functions rndis
     write /sys/class/android_usb/android0/enable 1
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 on property:sys.usb.config=rndis,adb
     write /sys/class/android_usb/android0/enable 0
@@ -71,7 +71,7 @@
     write /sys/class/android_usb/android0/functions rndis,adb
     write /sys/class/android_usb/android0/enable 1
     start adbd
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 # PTP
 on property:sys.usb.config=ptp
@@ -84,7 +84,7 @@
     write /sys/class/android_usb/android0/bDeviceProtocol 0
     write /sys/class/android_usb/android0/functions ptp
     write /sys/class/android_usb/android0/enable 1
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 on property:sys.usb.config=ptp,adb
     write /sys/class/android_usb/android0/enable 0
@@ -96,7 +96,7 @@
     write /sys/class/android_usb/android0/functions ptp,adb
     write /sys/class/android_usb/android0/enable 1
     start adbd
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 # diag
 on property:sys.usb.config=diag
@@ -113,7 +113,7 @@
     write /sys/class/android_usb/android0/functions acm,diag,mtp,adb
     write /sys/class/android_usb/android0/enable 1
     start adbd
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}
 
 on property:sys.usb.config=diag,adb
     stop adbd
@@ -129,4 +129,4 @@
     write /sys/class/android_usb/android0/functions acm,diag,mtp,adb
     write /sys/class/android_usb/android0/enable 1
     start adbd
-    setprop sys.usb.state $sys.usb.config
+    setprop sys.usb.state ${sys.usb.config}