bugfix for scripts/patch-kernel in 2.6 sublevel stepping

scripts/patch-kernel script can't patch a tree, say, from 2.6.25 to
2.6.26.1, because of a wrong comparison in context of patching 2.6.x base.
 Fix it.
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

scripts/patch-kernel

@@ -213,6 +213,7 @@ fi
 if [ $stopvers != "default" ]; then
 	STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
 	STOPEXTRA=`echo $stopvers | cut -d. -f4`
+	STOPFULLVERSION=${stopvers%%.$STOPEXTRA}
 	#echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"
 else
 	STOPSUBLEVEL=9999
@@ -249,7 +250,7 @@ while :				# incrementing SUBLEVEL (s in v.p.s)
 do
     CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
     EXTRAVER=
-    if [ $stopvers = $CURRENTFULLVERSION ]; then
+    if [ $STOPFULLVERSION = $CURRENTFULLVERSION ]; then
         echo "Stopping at $CURRENTFULLVERSION base as requested."
         break
     fi