wl1271: Remove RX workaround

Remove RX workaround which is not needed with newer firmware revisions. This
will reduce one SPI register transaction per RX packet.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_reg.h

@@ -213,7 +213,6 @@
 ==============================================*/
 #define ACX_REG_INTERRUPT_ACK          (REGISTERS_BASE + 0x04F0)
 
-#define RX_DRIVER_DUMMY_WRITE_ADDRESS  (REGISTERS_BASE + 0x0534)
 #define RX_DRIVER_COUNTER_ADDRESS      (REGISTERS_BASE + 0x0538)
 
 /* Device Configuration registers*/

drivers/net/wireless/wl12xx/wl1271_rx.c

@@ -187,8 +187,4 @@ void wl1271_rx(struct wl1271 *wl, struct wl1271_fw_status *status)
 	}
 
 	wl1271_reg_write32(wl, RX_DRIVER_COUNTER_ADDRESS, wl->rx_counter);
-
-	/* This is a workaround for some problems in the chip */
-	wl1271_reg_write32(wl, RX_DRIVER_DUMMY_WRITE_ADDRESS, 0x1);
-
 }