ARM: dts: qcom: Add MikroTik RB3011

This patch adds a DTS file for the MikroTik RouterBoard 3011, which is a
1U rackmount router based on the IPQ8064, supporting the serial UART,
dual QCA8337 Gigabit ethernet switches, boot loader NOR and user LED
device.

Signed-off-by: Jonathan McDowell <noodles@earth.li>
Link: https://lore.kernel.org/r/75390e66c9e6e36ddd42dc7f54cac28dfd7a24b9.1589824955.git.noodles@earth.li


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>