[arch][arm] Use conditional l/r register constraint in MMIO macros to fix Thumb-1 assembly#514

travisg with Copilot wants to merge 3 commits into

masterlittlekernel/lk:masterfrom

copilot/fix-arch-mmio-write32-assembler-errorlittlekernel/lk:copilot/fix-arch-mmio-write32-assembler-errorCopy head branch name to clipboard