arm64: dts: qcom: sdm660-xiaomi-lavender: Add eMMC and SD

This commit enable the SD card slot and internal MMC.

Signed-off-by: Dang Huynh <danct12@riseup.net>
Reviewed-by: Caleb Connolly <caleb@connolly.tech>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211120214227.779742-7-danct12@riseup.net