4.7 ATWILC Linux Release v15.5

The following are the bug fixes for ATWILC Linux Release v15.5

1. Fix Command(crc7) and Data(crc16) CRC check enabling on WILC SPI bus
2. Fix WILC AP mode hang up issue
3. Fix WILC1000 - Specific AP's are not getting detected during scan
4. Fix WILC3000 SPI: Sometimes bus communication error observed during PS mode
5. Fix WILC 3000 BLE fails to start advertising under some application command sequence
6. Fix WILC1000 SPI: Fix TXQ starvation issue
7. Fix Default GPIO's values are not getting populated
8. Fix WILC SPI failure recovery mechanism issue
9. Fix Gain table settings for WILC1000 and WILC3000 UA