Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c
index 8591f6a..b859d16 100644
--- a/drivers/pnp/pnpbios/bioscalls.c
+++ b/drivers/pnp/pnpbios/bioscalls.c
@@ -219,7 +219,7 @@
 		       module);
 		break;
 	case PNP_HARDWARE_ERROR:
-		printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n",
+		printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occurred\n",
 		       module);
 		break;
 	default: