samples: can: Added project configuration for MCP2515

Project configuration to run the CAN sample with the MCP2515 attached
via SPI as the CAN controller.

Signed-off-by: Karsten Koenig <[email protected]>

Author: karstenkoenig

samples/drivers/CAN/mcp2515-dts.overlay

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2019 Karsten Koenig
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi1 {
+	status = "ok";
+	mcp2515@0 {
+		compatible = "microchip,mcp2515";
+		spi-port-name = "SPI_1";
+		spi-max-frequency = <1000000>;
+		int-gpios = <&gpiob 4 GPIO_INT_ACTIVE_LOW>;
+		status = "ok";
+		label = "CAN_1";
+		reg = <0>;
+	};
+};

samples/drivers/CAN/prj.conf.mcp2515

@@ -0,0 +1,6 @@
+# CAN + MCP2515 config
+CONFIG_SPI=y
+CONFIG_CAN=y
+CONFIG_CAN_INIT_PRIORITY=80
+CONFIG_CAN_1=y
+CONFIG_CAN_MCP2515=y