Merge "Use inline assembly for UART MMIO." into main am: a7866789f5 am: 17a4e2fde3

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/3125955

Change-Id: I1a5c1962127594e3c65c9806605eb934ffefdade
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>