qcacld-3.0: Remove setConfig ioctl support

Change I1b699d5fe5b3182c292cf10c85f842169bf14342 ("qcacld-3.0:
Refactor stats cfg items") removed the last of the legacy dynamic
config items. Since there are no items for the setConfig ioctl to
modify, the support is obsolete, so remove it.

Change-Id: I82e8a352a1c6af07f64951dca6ec5c712dbccef9
CRs-Fixed: 2411168
5 files changed