[PATCH] Don't use "cut" in laptop mode control script -- it is in /usr.

From: Bart Samwel <bart@samwel.tk>

We don't want to use "cut" in the laptop mode control script, because that
is in /usr.  This patch is from Jasper Spaans.

Documentation/laptop-mode.txt

@@ -279,7 +279,13 @@ parse_mount_opts_wfstab () {
 	fi
 }
 
-KLEVEL="$(uname -r | cut -c1-3)"
+KLEVEL=$(
+           uname -r |
+             (
+	       IFS="." read a b c
+	       echo $a.$b
+	     )
+	 )
 case "$KLEVEL" in
 	"2.4"|"2.6")
 		true