ot1200: add ot1200_spl_defconfig file

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>#
diff --git a/configs/ot1200_spl_defconfig b/configs/ot1200_spl_defconfig
new file mode 100644
index 0000000..ad57f88
--- /dev/null
+++ b/configs/ot1200_spl_defconfig
@@ -0,0 +1,4 @@
+CONFIG_SPL=y
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,MX6Q"
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_OT1200=y