p54usb: support LM87 firmwares

This patch adds the necessary changes to support LM87 firmwares.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/p54/p54usb.h b/drivers/net/wireless/p54/p54usb.h
index 1baaff0..5b8fe91 100644
--- a/drivers/net/wireless/p54/p54usb.h
+++ b/drivers/net/wireless/p54/p54usb.h
@@ -72,6 +72,11 @@
 	u8 padding[8];
 } __attribute__((packed));
 
+struct lm87_tx_hdr {
+	__le32 device_addr;
+	__le32 chksum;
+} __attribute__((packed));
+
 /* Some flags for the isl hardware registers controlling DMA inside the
  * chip */
 #define ISL38XX_DMA_STATUS_DONE			0x00000001