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/mm/sc-ip22.c b/arch/mips/mm/sc-ip22.c
index dc7c5a5..026cb59 100644
--- a/arch/mips/mm/sc-ip22.c
+++ b/arch/mips/mm/sc-ip22.c
@@ -158,7 +158,7 @@
 	return 1;
 }
 
-/* XXX Check with wje if the Indy caches can differenciate between
+/* XXX Check with wje if the Indy caches can differentiate between
    writeback + invalidate and just invalidate.	*/
 static struct bcache_ops indy_sc_ops = {
 	.bc_enable = indy_sc_enable,