Add Pican2 support

In order to make Pican 2 work, we :
- add mcp2515.dto to the overlay list
- add a variable to enable it in local.conf
- create a udev rule to mount interface

http://skpang.co.uk/catalog/pican2-canbus-board-for-raspberry-pi-23-p-1475.html

Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.com>

recipes-core/udev/udev-rules-rpi.bb

@@ -2,7 +2,10 @@ DESCRIPTION = "udev rules for Raspberry Pi Boards"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
 
-SRC_URI = " file://99-com.rules"
+SRC_URI = " \
+	file://99-com.rules \
+	file://can.rules \
+	"
 
 S = "${WORKDIR}"
 
@@ -11,4 +14,5 @@ INHIBIT_DEFAULT_DEPS = "1"
 do_install () {
     install -d ${D}${sysconfdir}/udev/rules.d
     install -m 0644 ${WORKDIR}/99-com.rules ${D}${sysconfdir}/udev/rules.d/
+    install -m 0644 ${WORKDIR}/can.rules ${D}${sysconfdir}/udev/rules.d/
 }

recipes-core/udev/udev-rules-rpi/can.rules

@@ -0,0 +1 @@
+SUBSYSTEM=="net", DEVPATH=="/devices/platform/soc/3f204000.spi/spi_master/spi0/spi0.0/net/can0", RUN+="/sbin/ip link set can0 up type can bitrate 500000"