sm8450-common: rootdir: Add permissions for btfmslim node

Add permissions for btfmslim node to be
able to access from FTM.

Change-Id: Idd2988dff0967f05429e9e142937a96a274a4833

rootdir/etc/ueventd.qcom.rc

@@ -81,6 +81,7 @@ subsystem mem_buf_vm
 /dev/smd2                 0660   bluetooth  bluetooth
 /dev/smd3                 0660   bluetooth  bluetooth
 /dev/btpower              0660   bluetooth  system
+/dev/btfmslim             0660   bluetooth  system
 
 #permissions for pta
 /dev/pta                  0660   system     system