clocksource/drivers/em_sti: Fix variable declaration in em_sti_probe

'irq' and 'ret' are variables of the same type and there is no
need to use two lines.

Signed-off-by: Yangtao Li <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/clocksource/em_sti.c

···
 static int em_sti_probe(struct platform_device *pdev)
 {
 	struct em_sti_priv *p;
-	int irq;
-	int ret;
+	int irq, ret;
 
 	p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
 	if (p == NULL)