drivers/net/wireless/iwlwifi: remove exceptional & on function name

In this file, function names are otherwise used as pointers without &.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r@
identifier f;
@@

f(...) { ... }

@@
identifier r.f;
@@

- &f
+ f
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index dc81e19..d4b4988 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -355,7 +355,7 @@
 
 	init_timer(&rs_sta->rate_scale_flush);
 	rs_sta->rate_scale_flush.data = (unsigned long)rs_sta;
-	rs_sta->rate_scale_flush.function = &iwl3945_bg_rate_scale_flush;
+	rs_sta->rate_scale_flush.function = iwl3945_bg_rate_scale_flush;
 
 	for (i = 0; i < IWL_RATE_COUNT_3945; i++)
 		iwl3945_clear_window(&rs_sta->win[i]);