4.2 ATWILC Baremetal v4.7

The following are the bug fixes:

1. Fix WILC1000: SDIO failures on some parts when power save is enabled
2. Fix problem in retrieving TCP frames: Fixed handling of Block-Ack timer events
3. Fix WILC3000: Sdio bus issues when Power Save mode is enabled
4. Fix BLE advertising issues under some application command sequence
5. Fix BLE advertisement fails after repeated connect/disconnect
6. Fix BLE FW Assert locks up
7. Fix Provided an driver API for applications to disable 11n HT mode