Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
index 12fec72..1553d56 100644
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -82,7 +82,7 @@
 	help
 	  If running in painfully slow environments, such as an RTL
 	  simulation or from remote memory via SHdebug, where the memory
-	  can already be gauranteed to ber zeroed on boot, say Y.
+	  can already be guaranteed to ber zeroed on boot, say Y.
 
 	  For all other cases, say N. If this option seems perplexing, or
 	  you aren't sure, say N.