wl12xx: Moved wl1251 TX path implementation into chip specific files

Moved wl1251 TX path implementation into chip specific files to enable
parallel implementation for the wl1271 TX path.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index c1d00c01..c38aa54 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -163,6 +163,7 @@
 	void (*op_target_enable_interrupts)(struct wl12xx *wl);
 	int (*op_hw_init)(struct wl12xx *wl);
 	int (*op_plt_init)(struct wl12xx *wl);
+	void (*op_tx_flush)(struct wl12xx *wl);
 	void (*op_fw_version)(struct wl12xx *wl);
 
 	struct wl12xx_partition_set *p_table;