[MIPS] clocksource: use CLOCKSOURCE_MASK() macro

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index e5e56bd..751b4a1 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -306,7 +306,7 @@
 
 struct clocksource clocksource_mips = {
 	.name		= "MIPS",
-	.mask		= 0xffffffff,
+	.mask		= CLOCKSOURCE_MASK(32),
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 };