init.qcom.usb: Set default MSM8996 composition

Set the default USB composition for MSM8996 as below:
For msm8996 v1.0:
"diag,adb"

For msm8996 v2.0 and above:
"diag,serial_smd,serial_tty,rmnet_ipa,mass_storage,adb"

Change-Id: Ide70eec2e6a266eb5d9f52957a8c698712fc575d

rootdir/etc/init.qcom.usb.sh

@@ -37,6 +37,13 @@ else
     soc_hwplatform=`cat /sys/devices/system/soc/soc0/hw_platform` 2> /dev/null
 fi
 
+# Get hardware revision
+if [ -f /sys/devices/soc0/revision ]; then
+    soc_revision=`cat /sys/devices/soc0/revision` 2> /dev/null
+else
+    soc_revision=`cat /sys/devices/system/soc/soc0/revision` 2> /dev/null
+fi
+
 #
 # Allow persistent usb charging disabling
 # User needs to set usb charging disabled in persist.usb.chgdisabled
@@ -135,6 +142,14 @@ case "$usb_config" in
                                setprop persist.sys.usb.config diag,serial_smd,serial_tty,rmnet_ipa,mass_storage,adb
                             fi
                         ;;
+			"msm8996")
+			    if [ "$soc_revision" == "1.0" -o "$soc_hwplatform" == "Dragon" ]
+			    then
+                               setprop persist.sys.usb.config diag,adb
+			    else
+			       setprop persist.sys.usb.config diag,serial_smd,serial_tty,rmnet_ipa,mass_storage,adb
+			    fi
+			;;
                         "msm8909")
                             setprop persist.sys.usb.config diag,serial_smd,rmnet_qti_bam,adb
                         ;;