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/board/sunxi/Makefile b/board/sunxi/Makefile
index 8ca01f6..fab0877 100644
--- a/board/sunxi/Makefile
+++ b/board/sunxi/Makefile
@@ -33,6 +33,7 @@
 obj-$(CONFIG_TARGET_MINI_X)		+= dram_sun4i_360_512.o
 obj-$(CONFIG_TARGET_MINI_X_1GB)		+= dram_sun4i_360_1024_iow16.o
 obj-$(CONFIG_TARGET_MSI_PRIMO73)	+= dram_sun7i_384_1024_iow16.o
+obj-$(CONFIG_TARGET_PCDUINO)		+= dram_sun4i_408_1024_iow8.o
 obj-$(CONFIG_TARGET_PCDUINO3)		+= dram_linksprite_pcduino3.o
 obj-$(CONFIG_TARGET_QT840A)		+= dram_sun7i_384_512_busw16_iow16.o
 obj-$(CONFIG_TARGET_R7DONGLE)		+= dram_r7dongle.o