fix spelling in target sub directory

Cc: Richard Henderson <rth@twiddle.net>
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Alexander Graf <agraf@suse.de>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/target-sparc/TODO b/target-sparc/TODO
index c87459f..b8c727e 100644
--- a/target-sparc/TODO
+++ b/target-sparc/TODO
@@ -15,7 +15,7 @@
  - NPC/PC static optimisations (use JUMP_TB when possible)? (Is this
  obsolete?)
  - Synthetic instructions
- - MMU model dependant on CPU model
+ - MMU model dependent on CPU model
  - Select ASI helper at translation time (on V9 only if known)
  - KQemu/KVM support for VM only
  - Hardware breakpoint/watchpoint support