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_cs.c b/drivers/net/wireless/libertas/if_cs.c
index 2acbe5d..5814363 100644
--- a/drivers/net/wireless/libertas/if_cs.c
+++ b/drivers/net/wireless/libertas/if_cs.c
@@ -364,7 +364,7 @@
 	}
 
 	*len = if_cs_read16(priv->card, IF_CS_C_CMD_LEN);
-	if ((*len == 0) || (*len > MRVDRV_SIZE_OF_CMD_BUFFER)) {
+	if ((*len == 0) || (*len > LBS_CMD_BUFFER_SIZE)) {
 		lbs_pr_err("card cmd buffer has invalid # of bytes (%d)\n", *len);
 		goto out;
 	}
@@ -683,7 +683,7 @@
 			cmdbuf = priv->upld_buf;
 			priv->hisregcpy &= ~IF_CS_C_S_RX_UPLD_RDY;
 		} else {
-			cmdbuf = priv->cur_cmd->bufvirtualaddr;
+			cmdbuf = (u8 *) priv->cur_cmd->cmdbuf;
 		}
 
 		ret = if_cs_receive_cmdres(priv, cmdbuf, &priv->upld_len);