ARM: dts: qcom: apq8064: make pci regs property dt-schema compliant

Correctly format register pairs.

Fixes warning generated by `make qcom-apq8064-asus-nexus7-flo.dtb` as:
arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dt.yaml: soc: pci@1b500000:reg:0: [458227712, 4096, 458235904, 128, 459276288, 256, 267386880, 1048576] is too long

Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211225003502.115502-1-david@ixit.cz