Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 5a670c1..dd6628d 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -220,7 +220,7 @@
 	}
 
 	/*
-	 * Noone else is allowed.
+	 * No one else is allowed.
 	 */
 	mmput(mm);
 	return ERR_PTR(-EPERM);