vendorsetup: add p4 (GT-P7500; Galaxy Tab 10.1)

Change-Id: Id4089f1d71e8dac5a5dc1462563fdb33b398dafa
diff --git a/vendorsetup.sh b/vendorsetup.sh
index 279b225..d85bda5 100644
--- a/vendorsetup.sh
+++ b/vendorsetup.sh
@@ -16,6 +16,7 @@
 add_lunch_combo cm_p1-userdebug
 add_lunch_combo cm_p1c-userdebug
 add_lunch_combo cm_p3-userdebug
+add_lunch_combo cm_p4-userdebug
 add_lunch_combo cm_p4tmo-userdebug
 add_lunch_combo cm_p4vzw-userdebug
 add_lunch_combo cm_p4wifi-userdebug