arm64: dts: qcom: db845c: add Low speed expansion i2c and spi nodes

This patch adds support UART0, I2C0, I2C1 and SPI0 available
on Low Speed expansion connector.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200305145344.14670-5-srinivas.kandagatla@linaro.org


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