[PATCH] ipw2200: use generic ieee80211_get_hdrlen() to get packet length

replace ipw2200 specific frame_hdr_len() with generic
ieee80211 routine ieee80211_get_hdrlen()

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index 129891f..b2bbdf9 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -7895,7 +7895,8 @@
 					     le16_to_cpu(pkt->u.frame.length));
 
 				if (le16_to_cpu(pkt->u.frame.length) <
-				    frame_hdr_len(header)) {
+				    ieee80211_get_hdrlen(le16_to_cpu(
+						    header->frame_ctl))) {
 					IPW_DEBUG_DROP
 					    ("Received packet is too small. "
 					     "Dropping.\n");