MIPS: Fix misspellings in comments.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12617/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/dec/int-handler.S b/arch/mips/dec/int-handler.S
index 8c6f508..d7b9918 100644
--- a/arch/mips/dec/int-handler.S
+++ b/arch/mips/dec/int-handler.S
@@ -5,7 +5,7 @@
  * Written by Ralf Baechle and Andreas Busse, modified for DECstation
  * support by Paul Antoine and Harald Koerfgen.
  *
- * completly rewritten:
+ * completely rewritten:
  * Copyright (C) 1998 Harald Koerfgen
  *
  * Rewritten extensively for controller-driven IRQ support