mac80211: start moving scan code from mlme

Here's a first patch to move some code from mlme.c to a
new file called scan.c. The end result will hopefully be
a more manageable mlme.c.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index a169b02..376280a 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -7,6 +7,7 @@
 	sta_info.o \
 	wep.o \
 	wpa.o \
+	scan.o \
 	mlme.o \
 	iface.o \
 	rate.o \