[bus][pci] add routines to pass in PCI bus resources prior to starting the pci bus manager

Wire them up on arm and riscv which need them. x86-pc does not, so dont
call it.

Also fix a few miscellaneous bugs, notably PCI not detecting 64bit bars
properly due to an off by one bit error.

scripts/do-qemuarm

@@ -68,6 +68,7 @@ else
     QEMU="qemu-system-arm"
     CPU="cortex-a15"
     MACHINE="virt"
+    MACHINE+=",highmem=off" # disable the high PCI ECAM, since we dont support LPAE to map it
     _PROJECT="qemu-virt-arm32-test"
 fi
 if [ "$PROJECT" == "" ]; then