configs: add PineTab defconfig

The PineTab device-tree is already in u-boot, this commit adds the
corresponding defconfig, based on pinephone_defconfig.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 4fc2607..2543c94 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -471,6 +471,11 @@
 S:	Maintained
 F:	configs/pinephone_defconfig
 
+PINETAB BOARD
+M:	Arnaud Ferraris <arnaud.ferraris@collabora.com>
+S:	Maintained
+F:	configs/pinetab_defconfig
+
 R16 EVB PARROT BOARD
 M:	Quentin Schulz <quentin.schulz@free-electrons.com>
 S:	Maintained
diff --git a/configs/pinetab_defconfig b/configs/pinetab_defconfig
new file mode 100644
index 0000000..0cc2414
--- /dev/null
+++ b/configs/pinetab_defconfig
@@ -0,0 +1,10 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_DEFAULT_DEVICE_TREE="sun50i-a64-pinetab"
+CONFIG_SPL=y
+CONFIG_MACH_SUN50I=y
+CONFIG_SUNXI_DRAM_LPDDR3_STOCK=y
+CONFIG_DRAM_CLK=552
+CONFIG_DRAM_ZQ=3881949
+CONFIG_MMC_SUNXI_SLOT_EXTRA=2
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set