mfd: intel_soc_pmic_core: Terminate panel control GPIO lookup table correctly

GPIO lookup tables are supposed to be zero terminated. Let's do that
and avoid accidentally walking off the end.

Cc: [e-mail]
Fixes: 61dd2ca2d44e ("mfd: intel_soc_pmic_core: Add lookup table for Panel Control as GPIO signal")
Signed-off-by: Ville Syrjälä <[e-mail]>
Acked-by: Linus Walleij <[e-mail]>
Acked-by: Daniel Vetter <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/intel_soc_pmic_core.c

···
 	.table = {
 		/* Panel EN/DISABLE */
 		GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
+		{ },
 	},
 };