samples: sensor: qdec: add esp32s3 overlay

Add esp32s3 overlay to qdec sample to ilustrate
the use of PCNT in quadrature enconder mode.

Signed-off-by: Lucas Tamborrino <lucas.tamborrino@espressif.com>

samples/sensor/qdec/boards/esp32s3_devkitm.overlay

@@ -0,0 +1,44 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
+ */
+
+#include <dt-bindings/pinctrl/esp32s3-pinctrl.h>
+
+/ {
+	aliases {
+		qdec0 = &pcnt;
+	};
+};
+
+&pinctrl {
+	pcnt_default: pcnt_default {
+		group1 {
+			pinmux = <PCNT0_CH0SIG_GPIO35>,
+				<PCNT0_CH0CTRL_GPIO36>;
+			bias-pull-up;
+		};
+	};
+};
+
+&pcnt {
+	pinctrl-0 = <&pcnt_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	unit0@0 {
+		reg = <0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		filter = <100>;
+		channelA@0 {
+			reg = <0>;
+			sig-pos-mode = <2>;
+			sig-neg-mode = <1>;
+			ctrl-h-mode = <0>;
+			ctrl-l-mode = <1>;
+		};
+	};
+};