bus: ti-sysc: Fix using configured sysc mask value

We have cases where there are no softreset bits like with am335x lcdc.
In that case ti,sysc-mask = <0> needs to be handled properly.
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/bus/ti-sysc.c

@@ -1692,10 +1692,7 @@ static int sysc_init_sysc_mask(struct sysc *ddata)
 	if (error)
 		return 0;
 
-	if (val)
 	ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
-	else
-		ddata->cfg.sysc_val = ddata->cap->sysc_mask;
 
 	return 0;
 }