Host driver sends channel list and number of channels to lowi-server
in ANI_MSG_GET_OEM_CAP_RSP. 6Ghz channels in the channel list are not
useful for legacy lowi-server not supporting 6Ghz channels.
For legacy oem targets, driver sets "oem_6g_support_disable".
Change-Id: Ibc072ff2df3d7b246d3a48d7cebcb5feac35b715
CRs-Fixed: 2597645