QCA400x_Host_Driver_SDK

      - Added missing prototype for Custom_HW_SetClock function (by including custom_spi_api.h to hw_api.c)
      - Corrected include filename capitalization (QCA400X.h -> QCA400x.h)

      - Updated printing of assert and debug messages. Printing is done with the A_PRINTF() macro and is enabled by defining the A_PRINTF_ENABLED macro.
      - Corrected Custom_FreeRxRequest function in "pass-through" mode  (ENABLE_STACK_OFFLOAD = 0 and DRIVER_CONFIG_IMPLEMENT_RX_FREE_QUEUE = 1)
      - Updated SDK Configuration:
      -- Enabled DRIVER_CONFIG_IMPLEMENT_RX_FREE_QUEUE
      -- Increased Atheros task stack size to 4096
      -- Reduced maximum number of sockets: MAX_SOCKETS_SUPPORTED = 4
      -- Reduced timeouts: COMMAND_BLOCK_TIMEOUT and TRANSMIT_BLOCK_TIMEOUT
      - Updated Socket functionality:
      -- Updated Api_shutdown function: wait for command response
      -- Updated t_accept and Api_accept functions to return actual socket address length (in "* length" parameter)
      - Updated HW initialization: Added power down-up sequence of the WiFi module.
      - Added Auto-clear functionality for rtos Events (needed for DriverWakeEvent)

      Initial release based on Qualcomm QCA4002/4 Host Driver SDK v3.3.6