arm64: dts: qcom: qdu1000: Add SDHCI node

Add sdhc node for eMMC on QDU1000 and QRU1000 SoCs. Also add
required pins for SDHCI, so that the interface can work reliably.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230601111128.19562-3-quic_kbajaj@quicinc.com