[][MAC80211][mt76][Enhance iwpriv to read multiple cr]

[Description]
Add new feature to read a range of CRs by one command like $iwpriv phy0 mac
8318b080-8318b08c.

[Release-log]
N/A

Change-Id: If9d61f62da925ae0aab05ba443e0307d5b95e39e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7051709
1 file changed