trivial: typo (en|dis|avail|remove)bale -> (en|dis|avail|remove)able

drivers/char/amiserial.c

drivers/media/video/hdpvr/hdpvr-video.c

drivers/net/b44.h

drivers/net/e100.c

drivers/net/niu.h

drivers/scsi/megaraid.h

drivers/scsi/megaraid/mbox_defs.h

drivers/staging/rt2860/common/mlme.c

drivers/staging/rt2870/common/mlme.c

drivers/staging/rt3070/common/mlme.c

drivers/watchdog/iop_wdt.c

sound/pci/aw2/aw2-saa7146.c