PCI: fix comment typo in bus_numa.h

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

arch/x86/pci/bus_numa.h

@@ -2,7 +2,7 @@
 
 /*
  * sub bus (transparent) will use entres from 3 to store extra from
- * root, so need to make sure we have enought slot there, Should we
+ * root, so need to make sure we have enough slot there, Should we
  * increase PCI_BUS_NUM_RESOURCES?
  */
 #define RES_NUM 16