coccicheck: change handling of C={1,2} when M= is set

This patch reverts a portion of d0bc1fb4 so that coccicheck will
work properly when C=1 or C=2.
Reported-and-tested-by: NBrice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: NGreg Dietsche <Gregory.Dietsche@cuw.edu>
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NMichal Marek <mmarek@suse.cz>

scripts/coccicheck

@@ -9,15 +9,10 @@ if [ "$C" = "1" -o "$C" = "2" ]; then
 #    FLAGS="-ignore_unknown_options -very_quiet"
 #    OPTIONS=$*
 
-    if [ "$KBUILD_EXTMOD" = "" ] ; then
-        # Workaround for Coccinelle < 0.2.3
+# Workaround for Coccinelle < 0.2.3
 	FLAGS="-I $srctree/include -very_quiet"
 	shift $(( $# - 1 ))
 	OPTIONS=$1
-    else
-	echo M= is not currently supported when C=1 or C=2
-	exit 1
-    fi
 else
     ONLINE=0
     FLAGS="-very_quiet"