drivers/ssb/: Spelling fixes

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

drivers/ssb/b43_pci_bridge.c

 /*
  * Broadcom 43xx PCI-SSB bridge module
  *
- * This technically is a seperate PCI driver module, but
+ * This technically is a separate PCI driver module, but
  * because of its small size we include it in the SSB core
  * instead of creating a standalone module.
  *