[PATCH] fix NET_RADIO=n, IEEE80211=y compile

This patch fixes the following compile error with CONFIG_NET_RADIO=n and
CONFIG_IEEE80211=y:

LD .tmp_vmlinux1
net/built-in.o: In function `ieee80211_rx':
: undefined reference to `wireless_spy_update'
make: *** [.tmp_vmlinux1] Error 1

Signed-off-by: Adrian Bunk <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

net/ieee80211/ieee80211_rx.c

···
 	/* Put this code here so that we avoid duplicating it in all
 	 * Rx paths. - Jean II */
 #ifdef IW_WIRELESS_SPY		/* defined in iw_handler.h */
+#ifdef CONFIG_NET_RADIO
 	/* If spy monitoring on */
 	if (ieee->spy_data.spy_number > 0) {
 		struct iw_quality wstats;
···
 		/* Update spy records */
 		wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 	}
+#endif				/* CONFIG_NET_RADIO */
 #endif				/* IW_WIRELESS_SPY */
 
 #ifdef NOT_YET