[MIPS] clocksource: use CLOCKSOURCE_MASK() macro

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/time.c

@@ -306,7 +306,7 @@ static unsigned int __init calibrate_hpt(void)
 
 struct clocksource clocksource_mips = {
 	.name		= "MIPS",
-	.mask		= 0xffffffff,
+	.mask		= CLOCKSOURCE_MASK(32),
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 };