mfd: wm8350 variable dereferenced before check

Remove "wm8350->irq_base = pdata->irq_base" to avoid
null pointer exception and wm8350->irq_base got from
irq_alloc_descs().

Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm8350-irq.c

@@ -496,7 +496,6 @@ int wm8350_irq_init(struct wm8350 *wm8350, int irq,
 
 	mutex_init(&wm8350->irq_lock);
 	wm8350->chip_irq = irq;
-	wm8350->irq_base = pdata->irq_base;
 
 	if (pdata && pdata->irq_base > 0)
 		irq_base = pdata->irq_base;