sunxi: add Linksprite pcDuino v1/v2 support

Add support for a sun4i board built by Linksprite. This addition covers
both v1 and v2 versions. As the board has been working with 408MHz memory
setting in the u-boot-sunxi branch, and has been proven to be running stable
during my tests as well, a respective new DRAM config file is added as well.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/configs/Linksprite_pcDuino_defconfig b/configs/Linksprite_pcDuino_defconfig
new file mode 100644
index 0000000..f5b0ca9
--- /dev/null
+++ b/configs/Linksprite_pcDuino_defconfig
@@ -0,0 +1,7 @@
+CONFIG_SPL=y
+CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER,SUNXI_EMAC,USB_EHCI"
+CONFIG_FDTFILE="sun4i-a10-pcduino.dtb"
++S:CONFIG_ARM=y
++S:CONFIG_ARCH_SUNXI=y
++S:CONFIG_MACH_SUN4I=y
++S:CONFIG_TARGET_PCDUINO=y