DIV [m8/16] does not highlight destination registers

[hasithvm]

The div [mem] instruction doesn't highlight the destination register (AX for 8-bit source operands, DX/AX for 16-bit source operands).

Steps to reproduce:

1. Load obj file with a DIV [mem] instruction.
2. Observe non-highlighting of AX/DX:AX for destination operands.

(via @jrgreen7)