[WCNCR00147259] regd: fix crash problem if setting country multiple times

[Description]
Fix crash problem of regd and refine regd messages
1. Fix crash/assert problem when user sets country code for multiple times
2. Fix crash problem of issuing command 'iwpriv wlan0 driver get_channels'
3. Refine/shorten log messages when updating regd channels
4. Refine display messages of "get_channels" result
5. Modify Makefile.x86 to allow changing ko chip name

Feature: regd
Change-Id: I584b92fa29fef250ae48655b4efe77861a885889
Signed-off-by: Sarick Jiang <sarick.jiang@mediatek.com>
CR-Id: WCNCR00147259
7 files changed