mac80211: Fix warnings due to -Wunused-but-set-variable

These warnings are exposed by gcc 4.6.
net/mac80211/sta_info.c: In function 'sta_info_cleanup_expire_buffered':
net/mac80211/sta_info.c:590:32: warning: variable 'sdata' set but not used
net/mac80211/ibss.c: In function 'ieee80211_rx_mgmt_auth_ibss':
net/mac80211/ibss.c:43:34: warning: variable 'status_code' set but not used
net/mac80211/work.c: In function 'ieee80211_send_assoc':
net/mac80211/work.c:203:9: warning: variable 'len' set but not used
net/mac80211/tx.c: In function '__ieee80211_parse_tx_radiotap':
net/mac80211/tx.c:1039:35: warning: variable 'sband' set but not used
net/mac80211/mesh.c: In function 'ieee80211_mesh_rx_queued_mgmt':
net/mac80211/mesh.c:616:28: warning: variable 'ifmsh' set but not used
 ...

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index 4bd6ef0..b9b595c 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -54,13 +54,12 @@
 			       u8 *cdata, u8 *mic)
 {
 	int i, j, last_len, num_blocks;
-	u8 *pos, *cpos, *b, *s_0, *e, *b_0, *aad;
+	u8 *pos, *cpos, *b, *s_0, *e, *b_0;
 
 	b = scratch;
 	s_0 = scratch + AES_BLOCK_LEN;
 	e = scratch + 2 * AES_BLOCK_LEN;
 	b_0 = scratch + 3 * AES_BLOCK_LEN;
-	aad = scratch + 4 * AES_BLOCK_LEN;
 
 	num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
 	last_len = data_len % AES_BLOCK_LEN;
@@ -94,13 +93,12 @@
 			      u8 *cdata, size_t data_len, u8 *mic, u8 *data)
 {
 	int i, j, last_len, num_blocks;
-	u8 *pos, *cpos, *b, *s_0, *a, *b_0, *aad;
+	u8 *pos, *cpos, *b, *s_0, *a, *b_0;
 
 	b = scratch;
 	s_0 = scratch + AES_BLOCK_LEN;
 	a = scratch + 2 * AES_BLOCK_LEN;
 	b_0 = scratch + 3 * AES_BLOCK_LEN;
-	aad = scratch + 4 * AES_BLOCK_LEN;
 
 	num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN);
 	last_len = data_len % AES_BLOCK_LEN;