Merge patch series "Fixes for Clang builds for AArch64, improve CROSS_COMPILE handling"

Dmitrii Sharshakov <d3dx12.xx@gmail.com> says:

Initially fix the inconsistency reported in reply to the previous
series and also make sure AArch64 images can be built with latest
Clang versions by guarding AArch32-specific options behind extra
config checks.

Tested qemu_arm_defconfig and qemu_arm64_defconfig with Clang 21,
mainline (to be 22) ce7f9f9c and also Clang 18 (for AArch64 only, as I
have not managed to build an AArch32 image with clang-18).

Link: https://lore.kernel.org/r/20251108-clang-cross-fixes-v1-0-ea6c4282844a@gmail.com

diff --cc Makefile
Simple merge