qcacld-3.0: Convert open adapters to vtable map

Using a switch case as a method for mapping an enumerated value to a
handler function has the down side of allowing future changes to pollute
the switch case with additional logic. It also tends to lead to high
cyclomatic complexity. Avoid these issues in hdd_open_adapters_for_mode
by converting the switch case to a vtable.

Change-Id: If91cbaf1e0ed561122b599550f3c450ec47eda31
CRs-Fixed: 2335970
1 file changed