arm64: dts: hamoa: optimize PCIe bandwidth voting and power requirements for Gen1/Gen2 x1 links

[abhi6246-OSS]

Update the PCIe device tree configuration to reduce power requirements and align interconnect bandwidth voting tags with the latest RPMh-based definitions.

Replace legacy interconnect tags:

QCOM_ICC_TAG_ALWAYS → RPM_ALWAYS_TAG
QCOM_ICC_TAG_ACTIVE_ONLY → RPM_ACTIVE_TAG

Reduce PCIe power-domain requirements for Gen1 and Gen2 x1 operating points:

Change required-opps from rpmpd_opp_nom to rpmpd_opp_low_svs
Applied to:
opp-2500000 (Gen1 x1)
opp-5000000 (Gen2 x1)

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