wlan: Fix build for FEATURE_WLAN_CH_AVOID

Build fails if we disable FEATURE_WLAN_CH_AVOID
feature from Kbuild.

Change-Id: I47b28825b315997b829beed27095f6aa27f1cab3
CRs-fixed: 634826
(cherry picked from commit 245328118a4692f4c8f282e8e6145787ddbc04bf)
1 file changed
tree: 9eacdef8f502d5ab5ffa388b22da5e7cbfb45fbc
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig