[Bug target/64224] [ARM] -mapcs -marm uses deprecated forms (as of ARMv7-A) of LDM in epilogues

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64224

--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Might be better to just deprecate -mapcs; it's a feature of the old ABI anyway,
so there's not much point in trying to make it fully conform to the latest
specs.