arm64: dts: qcom: ipq9574: use 'pcie' as node name for 'pcie0'

arm64: dts: qcom: ipq9574: use 'pcie' as node name for 'pcie0'

The PCI controller at address 28000000 supports PCIe only, so use 'pcie'
as node name for that. This ensures that all PCIe controller instance
nodes are using the same name.

Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250618-ipq9574-pcie0-name-v1-1-f0a8016ea504@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>