Fix several typos in drivers/

Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index dab0820..8ee2ca1 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -40,10 +40,10 @@
 	default y
 	---help---
 	  This option enables support for the various files in
-	  /proc/scsi.  In Linux 2.6 this has been superceeded by
+	  /proc/scsi.  In Linux 2.6 this has been superseded by
 	  files in sysfs but many legacy applications rely on this.
 
-	  If unusure say Y.
+	  If unsure say Y.
 
 comment "SCSI support type (disk, tape, CD-ROM)"
 	depends on SCSI