Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/video/via/via_utility.c b/drivers/video/via/via_utility.c
index d05ccb6..35458a5 100644
--- a/drivers/video/via/via_utility.c
+++ b/drivers/video/via/via_utility.c
@@ -174,7 +174,7 @@
 	}
 
 	/* If adjust Gamma value in SAMM, fill IGA1,
-	   IGA2 Gamma table simultanous. */
+	   IGA2 Gamma table simultaneous. */
 	/* Switch to IGA2 Gamma Table */
 	if ((active_device_amount > 1) &&
 		!((viaparinfo->chip_info->gfx_chip_name ==