wlan: Add feature capability check to the features using debugfs

Add feature capability check to WoWL feature and Periodic Tx Pattern
Offload feature using debugfs interface. Also add the change that only
checks if it's in connected state when adding patterns.

Change-Id: I42ff4845b660218beaed1408cf762877276a5b52
CRs-fixed: 528870, 524374
3 files changed
tree: ea0510a1977fc71b84ac8db6c9e159e665efb5f9
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig