Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/pps/Kconfig b/drivers/pps/Kconfig
index f0d3376..258ca59 100644
--- a/drivers/pps/Kconfig
+++ b/drivers/pps/Kconfig
@@ -35,7 +35,7 @@
 	depends on PPS && !NO_HZ
 	help
 	  This option adds support for direct in-kernel time
-	  syncronization using an external PPS signal.
+	  synchronization using an external PPS signal.
 
 	  It doesn't work on tickless systems at the moment.