libertas: rename and re-type bufvirtualaddr to cmdbuf

Make it a struct cmd_header, since that's what it is, and clean up
the places that it's used.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 1ed72b9..7f829c8 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -142,14 +142,14 @@
 		goto out;
 	}
 
-	if (size > MRVDRV_SIZE_OF_CMD_BUFFER) {
+	if (size > LBS_CMD_BUFFER_SIZE) {
 		lbs_deb_sdio("response packet too large (%d bytes)\n",
 			(int)size);
 		ret = -E2BIG;
 		goto out;
 	}
 
-	memcpy(card->priv->cur_cmd->bufvirtualaddr, buffer, size);
+	memcpy(card->priv->cur_cmd->cmdbuf, buffer, size);
 	card->priv->upld_len = size;
 
 	card->int_cause |= MRVDRV_CMD_UPLD_RDY;