Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 38bc280..33bba7b 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -125,7 +125,7 @@
 	hose_tail = &hose->next;
 
 	/*
-	 * Do not panic here but later - this might hapen before console init.
+	 * Do not panic here but later - this might happen before console init.
 	 */
 	if (!hose->io_map_base) {
 		printk(KERN_WARNING