samples: cellular: slm_shell: Power/indicate pins to devicetree

Move power and indicate pins from Kconfig to devicetree.

Jira: LRCS-114

Signed-off-by: Tommi Rantanen <[email protected]>

Author: trantanen

samples/cellular/slm_shell/boards/nrf5340dk_nrf5340_cpuapp.overlay

@@ -28,6 +28,17 @@
 	pinctrl-names = "default", "sleep";
 };
 
+/ {
+	slm_gpio_pins: slm_gpio_pins {
+		compatible = "slm-gpio-pins";
+		power-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;
+		power-gpios-active-time-ms = <100>;
+		power-gpios-debounce-time-ms = <50>;
+		indicate-gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
+		indicate-gpios-active-time-ms = <100>;
+	};
+};
+
 &pinctrl {
 	uart2_default: uart2_default {
 		group1 {