arm64: dts: qcom: qcs6490-rb3gen2: Add missing clkreq pinctrl property

arm64: dts: qcom: qcs6490-rb3gen2: Add missing clkreq pinctrl property

Add the missing clkreq pinctrl entry to the PCIe1 node. This ensures proper
configuration of the CLKREQ# signal, which is needed for proper functioning
of PCIe ASPM.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250717-clkreq-v1-1-5a82c7e8e891@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>