Coccinelle: Fix patch output when coccicheck is used with M= and C=

When the M variable is used, the -patch option should be given
to spatch. This patch fixes the case where C is used.
Signed-off-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/coccicheck

@@ -29,10 +29,14 @@ else
     if [ "$KBUILD_EXTMOD" = "" ] ; then
         OPTIONS="-dir $srctree $COCCIINCLUDE"
     else
-        OPTIONS="-dir $KBUILD_EXTMOD -patch $srctree $COCCIINCLUDE"
+        OPTIONS="-dir $KBUILD_EXTMOD $COCCIINCLUDE"
     fi
 fi
 
+if [ "$KBUILD_EXTMOD" != "" ] ; then
+    OPTIONS="-patch $srctree $OPTIONS"
+fi
+
 if [ ! -x "$SPATCH" ]; then
     echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
     exit 1