iw: fix typo on LDPC capability
iw: fix typo on LDPC capability

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

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