At present the pre CAC is done based on original SAP's BW,
but usually the original SAP is on 2G and BW <= 40Mhz. The
requirement from user is to have higher BW on 5G. Hence, select
higher BW supported by SAP phymode to do pre CAC and move 2G
SAP to 5G pre CAC channel when pre CAC done successfully.
Also set the default MAX bw pre CAC to 80Mhz based on current user
request.
Change-Id: I3115da8eb649238da50b223c2587db96125ec813
CRs-Fixed: 2984084
a97eee4294