typo fixes

Most of these fixes were already submitted for old kernel versions, and were
approved, but for some reason they never made it into the releases.

Because this is a consolidation of a couple old missed patches, it touches both
Kconfigs and documentation texts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 4dc142d..3ecff5e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1812,7 +1812,7 @@
 	  but it is independent of the system firmware.   And like a reboot
 	  you can start any kernel with it, not just Linux.
 
-	  The name comes from the similiarity to the exec system call.
+	  The name comes from the similarity to the exec system call.
 
 	  It is an ongoing process to be certain the hardware in a machine
 	  is properly shutdown, so do not be surprised if this code does not