sm6225-common: Create mount points out of Android.mk

Change-Id: Id5986b8a740e45f864eecdd2bd82d9455f128d6b
diff --git a/common.mk b/common.mk
index 3546c28..1758a68 100644
--- a/common.mk
+++ b/common.mk
@@ -150,6 +150,12 @@
     FrameworksResTarget \
     WifiResTarget
 
+# Mountpoints
+PRODUCT_PACKAGES += \
+    vendor_bt_firmware_mountpoint \
+    vendor_dsp_mountpoint \
+    vendor_firmware_mnt_mountpoint
+
 # Power
 PRODUCT_PACKAGES += \
     android.hardware.power-service-qti