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/kernel/setup.c b/arch/sh/kernel/setup.c
index 4f26716..58bff45 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -150,7 +150,7 @@
 	}
 
 	/*
-	 * If we got this far inspite of the boot loader's best efforts
+	 * If we got this far in spite of the boot loader's best efforts
 	 * to the contrary, assume we actually have a valid initrd and
 	 * fix up the root dev.
 	 */