qcacld-3.0: Add fallthrough comment between switch cases
Currently, there is no break statement between switch cases in
function hdd_stop_present_mode(), here first case has to
fall through the next case instead of using break statement.
Add /* fallthrough */ comment between the cases.
Change-Id: I518628fb8ee084a0ea8de5c98c18a9a6c20b2637
CRs-Fixed: 2233177