omap3: cm-t3517: add basic board support

CompuLab cm-t3517 is Computer on Module (CoM) based on AM3517 SoC.
Features: up to 256MB DDR2, up to 512MB NAND, USB hub, mUSB, WiFi, BT,
Analog audio codec, touch screen controller, LED.

Add basic support including:
LED, Serial console, NAND, MMC, GPIO, I2C, 256MB DRAM.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/configs/cm_t3517_defconfig b/configs/cm_t3517_defconfig
new file mode 100644
index 0000000..4000d2c
--- /dev/null
+++ b/configs/cm_t3517_defconfig
@@ -0,0 +1,4 @@
+CONFIG_SPL=n
++S:CONFIG_ARM=y
++S:CONFIG_OMAP34XX=y
++S:CONFIG_TARGET_CM_T3517=y