iw: add country IE parsing
iw: add country IE parsing

Spits out the channels as seen on the IE, useful when debugging
issues with APs. When found the equivalent distance of the
coverage class is printed out.

Signed-off-by: Luis R. Rodriguez <79e6b8107a8aa3944e09fad43634662ac3b91a0b@atheros.com>

bw-oss/iw,chunyeow/iw,idor/iw,Distrotech/iw,cozybit/iw,TeamEOS/external_iw,SoluMachines/external_iw,TeamEOS/external_iw,Distrotech/iw,greearb/iw-ct,SoluMachines/external_iw,OSLL/iw,timduru/platform-external-iw,OSLL/iw,bw-oss/iw,timduru/platform-external-iw,chunyeow/iw,greearb/iw-ct,idor/iw,cozybit/iw,CTU-IIG/802.11p-iw,CTU-IIG/802.11p-iw