LAPDm_RAW_PT: Always pad MAC blocks to their size

If a LAPDm message is shorter than the MAC block size, we must pad
it before seding it to L1.  trxcon e.g. would ignore any frames with
the wrong length since Change-Id I258ee9f6d0124b183b1db23a73f1e523fcea89a8

Change-Id: I30bcce27f95974eaca4168a156d1548586c924d6
Related: OS#3415
1 file changed