[WCNCR00147237] misc: Add iw command "GET_CNM"

[Description]
Add the "GET_CNM" command to get CNM information from
firmware.

Change-Id: I8b368b5e08019aa3da9b22d1fb759e9c7522c377
Feature: misc
Signed-off-by: Th3 Huang <th3.huang@mediatek.com>
CR-Id: WCNCR00147237
3 files changed