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/aic7xxx_old.txt b/Documentation/scsi/aic7xxx_old.txt
index 1c8c69b..c92f447 100644
--- a/Documentation/scsi/aic7xxx_old.txt
+++ b/Documentation/scsi/aic7xxx_old.txt
@@ -241,7 +241,7 @@
         that instead of dumping the register contents on the card, this
 	option dumps the contents of the sequencer program RAM.  This gives
 	the ability to verify that the instructions downloaded to the
-	card's sequencer are indeed what they are suppossed to be.  Again,
+	card's sequencer are indeed what they are supposed to be.  Again,
 	unless you have documentation to tell you how to interpret these
 	numbers, then it is totally useless.