qcacmn: Change WMI command limit to 256 from 1024
qcacld-2.0 to qcacmn propagation
To debug the fwr stuck issue as early as possibile,
reduce the wmi max pending command threshold to 256
from 1024.
Change-Id: Ic3cbe26cca979dcaa68fca03e6fe1af397cf0c4f
CRs-FIXED: 1080761