tcg: update TODO

Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6807 c046a42c-6fe2-441c-8c8c-71466251a162

tcg/TODO

-- Add new instructions such as: andnot, ror, rol, setcond, clz, ctz,
-  popcnt.
+- Add new instructions such as: setcond, clz, ctz, popcnt.
 
 - See if it is worth exporting mul2, mulu2, div2, divu2.