[clang] [llvm] [AVR] Handle flash RO data mapped to data space for newer devices (PR #146244)

[Tom Vijlbrief via llvm-commits]

tomtor wrote:

> I do not think this PR is necessary, since there is no bug, I have explained in #146537.

You are right, so this PR is not a bug fix, but just adding features and a minor optimization.


https://github.com/llvm/llvm-project/pull/146244