[MIPS] Fix the installation condition of MIPS clocksource

Signed-off-by: Yoichi Yuasa <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/kernel/time.c

···
 {
 	plat_time_init();
 
-	if (mips_clockevent_init() || !cpu_has_mfc0_count_bug())
+	if (!mips_clockevent_init() || !cpu_has_mfc0_count_bug())
 		init_mips_clocksource();
 }