Fix typos in Documentation/: 'S'

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letter 'S'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Alan Cox <alan@redhat.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/scsi/aacraid.txt b/Documentation/scsi/aacraid.txt
index ee03678..3367130 100644
--- a/Documentation/scsi/aacraid.txt
+++ b/Documentation/scsi/aacraid.txt
@@ -4,7 +4,7 @@
 -------------------------
 The aacraid driver adds support for Adaptec (http://www.adaptec.com)
 RAID controllers. This is a major rewrite from the original
-Adaptec supplied driver. It has signficantly cleaned up both the code
+Adaptec supplied driver. It has significantly cleaned up both the code
 and the running binary size (the module is less than half the size of
 the original).