My patch 
24fc32b3 ("ath6kl: add ath6kl_bmi_write_hi32()") caused a regression
in ath6kl_upload_board_file() and the board_address variable was not
properly initialised in some cases:
ath6kl/init.c:1068:6: warning: ‘board_address’ may be used uninitialized
in this function
Most likely this broke ar6004 support but I can't test that right now.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
         * writing board data.
         */
        if (ar->hw.board_addr != 0) {
+               board_address = ar->hw.board_addr;
                ath6kl_bmi_write_hi32(ar, hi_board_data,
-                                     ar->hw.board_addr);
+                                     board_address);
        } else {
                ath6kl_bmi_read_hi32(ar, hi_board_data, &board_address);
        }