clocksource: tcb_clksrc: fix setup_clkevents error path

t2_clk is already disabled before request_irq(), it must not be disabled
again.

Signed-off-by: Boris Brezillon <[e-mail]>
Signed-off-by: Alexandre Belloni <[e-mail]>
Acked-by: Daniel Lezcano <[e-mail]>

drivers/clocksource/tcb_clksrc.c

···
 
 	ret = request_irq(irq, ch2_irq, IRQF_TIMER, "tc_clkevt", &clkevt);
 	if (ret) {
-		clk_disable_unprepare(t2_clk);
+		clk_unprepare(t2_clk);
 		return ret;
 	}