qcacld-3.0: Use vtable in __iw_setint_getnone()

One of the HDD functions with the highest cyclomatic complexity is
__iw_setint_getnone(). A prior set of changes has refactored all of
the individual sub-ioctl handling into separate functions with a
consistent signature. Now convert __iw_setint_getnone() to use a
vtable as the last step of refactoring.

Change-Id: I7f9d5442083a58b9f36e3bb874748d0d5068bc12
CRs-Fixed: 2350073
1 file changed