Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 2b09775..cbff2ec 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -1444,7 +1444,7 @@
 		root_server_addr = addr;
 
 	/*
-	 * Use defaults whereever applicable.
+	 * Use defaults wherever applicable.
 	 */
 	if (ic_defaults() < 0)
 		return -1;