A5U uses a Melfas MMS345L touchscreen that is connected to
blsp_i2c5. Add it to the device tree.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20200426140642.204395-5-stephan@gerhold.netSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>