Fix "can not" in Documentation and Kconfig

Randy brought it to my attention that in proper english "can not" should always
be written "cannot". I donot see any reason to argue, even if I mightnot
understand why this rule exists.  This patch fixes "can not" in several
Documentation files as well as three Kconfigs.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/scsi/aic7xxx_old.txt b/Documentation/scsi/aic7xxx_old.txt
index 433e942..1c8c69b 100644
--- a/Documentation/scsi/aic7xxx_old.txt
+++ b/Documentation/scsi/aic7xxx_old.txt
@@ -102,7 +102,7 @@
     The hardware RAID devices sold by Adaptec are *NOT* supported by this
     driver (and will people please stop emailing me about them, they are
     a totally separate beast from the bare SCSI controllers and this driver
-    can not be retrofitted in any sane manner to support the hardware RAID
+    cannot be retrofitted in any sane manner to support the hardware RAID
     features on those cards - Doug Ledford).