[clang] [llvm] [ARM] Adding diagnostics for mcmodel=tiny when used in invalid targets (PR #125643)

[via llvm-commits]

ShashwathiNavada wrote:

> We typically add such incompatibility check in clang/lib/Driver instead of clang/lib/Frontend.
> 
> (Apologies, I will have limited internet access between April 20th and May 4th, and my response time may be delayed.. Happy if a regular clang maintainer is happy.)

Thanks for the response, I have made the changes in clang/lib/Driver

https://github.com/llvm/llvm-project/pull/125643