Move the pci start address from 70000000 to 2c000000

https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/3371116
moved the pci start from 0x100000 to 0x70000000. Gunyah allows only
0x1000 to 0x40000000 to be mapped as device memory and the new PCI start
address goes beyond this range. For now, move the PCI start to a known
physical device free memory within 0x40000000.

Bug: 376480819
Change-Id: Ia476b087010ccbd9c75f214aa8ae0d3707fc8413
diff --git a/build/microdroid/bootconfig.arm64 b/build/microdroid/bootconfig.arm64
index 7509a2c..f257c81 100644
--- a/build/microdroid/bootconfig.arm64
+++ b/build/microdroid/bootconfig.arm64
@@ -1 +1 @@
-androidboot.boot_devices = 72000000.pci
+androidboot.boot_devices = 2e000000.pci