sunxi: add MangoPi MQ-R board support

The MangoPi MQ-R board uses an Allwinner T113s Soc (with 128MB of
embedded DRAM), support for which was just added to the code.

Since the devicetree was already synced from the latest Linux kernel
tree, all we need is a _defconfig file to add support for the board.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/configs/mangopi_mq_r_defconfig b/configs/mangopi_mq_r_defconfig
new file mode 100644
index 0000000..66ae639
--- /dev/null
+++ b/configs/mangopi_mq_r_defconfig
@@ -0,0 +1,15 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_DEFAULT_DEVICE_TREE="sun8i-t113s-mangopi-mq-r-t113"
+CONFIG_SPL=y
+CONFIG_MACH_SUN8I_R528=y
+CONFIG_DRAM_CLK=792
+CONFIG_DRAM_ZQ=8092667
+CONFIG_SUNXI_MINIMUM_DRAM_MB=128
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_DRAM_SUNXI_ODT_EN=0
+CONFIG_DRAM_SUNXI_TPR0=0x004a2195
+CONFIG_DRAM_SUNXI_TPR11=0x340000
+CONFIG_DRAM_SUNXI_TPR12=0x46
+CONFIG_DRAM_SUNXI_TPR13=0x34000100
+CONFIG_CONS_INDEX=4