[Bug target/109415] No predefined macros to differentiate between ARM Cortex-M33 and Cortex-M55

[Vedant.VijayYevale at infineon dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109415

--- Comment #7 from vedant <Vedant.VijayYevale at infineon dot com> ---
in ARM and IAR as well ARMv8.1-m vs ARMv8-m have different macros. it is needed
to maintain code compatibility in different build ecosystems. instead of
specifying -DXYZ everywhere