configs: add support for LinkSprite pcDuino

Add basic support for LinkSprite pcDuino board series
including pcDuino, pcDuino-Lite, pcDuino-Lite-WiFi.
Tested on pcDuino-Lite-WiFi.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

board/linksprite/pcduino/genimage.cfg

@@ -0,0 +1,41 @@
+#
+# Minimal SD card image for the pcDuino
+#
+
+image boot.vfat {
+	vfat {
+		files = {
+			"zImage",
+			"sun4i-a10-pcduino.dtb",
+			"boot.scr"
+		}
+	}
+	size = 16M
+}
+
+#
+# Note: u-boot environment is stored between u-boot and boot partitions
+#
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot {
+		in-partition-table = "no"
+		image = "u-boot-sunxi-with-spl.bin"
+		offset = 8192
+	}
+
+	partition boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+		offset = 1M
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+	}
+}