pinctrl: cherryview: Add terminate entry for dmi_system_id tables

Make sure dmi_system_id tables are NULL terminated.

Fixes: 70365027 ("pinctrl: cherryview: Add a quirk to make Acer
Chromebook keyboard work again")
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Acked-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/intel/pinctrl-cherryview.c

@@ -1547,7 +1547,8 @@ static const struct dmi_system_id chv_no_valid_mask[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Edgar"),
 			DMI_MATCH(DMI_BIOS_DATE, "05/21/2016"),
 		},
-	}
+	},
+	{}
 };
 
 static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)