arm64: dts: hisilicon: hi3660-hikey960: Allow USR4 LED to notify kernel panic

Blink the LED on a kernel panic.
Signed-off-by: NAmit Kucheria <amit.kucheria@linaro.org>
Acked-by: NGuodong Xu <guodong.xu@linaro.org>
Tested-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts

@@ -109,6 +109,7 @@
 			label = "user_led4";
 			/* gpio_190_user_led4 */
 			gpios = <&gpio23 6 0>;
+			panic-indicator;
 			linux,default-trigger = "cpu0";
 		};