ARM: dts: qcom: Add apq8064 Dragon Board 600c support

This patch add support to DB600c board, which is another
96boards based on Qualcomm APQ8064 SoC.

Support for USB, HDMI, PCIe, I2C, SPI, eMMC, microSD card, LEDs
device tree nodes is added in this patch.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>