ath6kl: fix missing uart debug pin for 6004 HW 3.0

For some reason, the 6004 HW 3.0 definition was missing the value for the
uarttx_pin (used for firmware debug). This corrects this situation.
Signed-off-by: Steve deRosier <steve.derosier@lairdtech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/init.c

@@ -173,6 +173,7 @@ static const struct ath6kl_hw hw_list[] = {
 		.reserved_ram_size		= 7168,
 		.board_addr			= 0x436400,
 		.testscript_addr		= 0,
+		.uarttx_pin			= 11,
 		.flags				= 0,
 
 		.fw = {