omap3: add support for QUIPOS Cairo board.

This patch extends OMAP3 support for AM/DM37xx and
introduces the AM3703-based Quipos Cairo board.

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/cairo_defconfig b/configs/cairo_defconfig
new file mode 100644
index 0000000..ae1dda2
--- /dev/null
+++ b/configs/cairo_defconfig
@@ -0,0 +1,4 @@
+CONFIG_SPL=y
++S:CONFIG_ARM=y
++S:CONFIG_OMAP34XX=y
++S:CONFIG_TARGET_OMAP3_CAIRO=y