compiler-gcc: integrate the various compiler-gcc[345].h files

As gcc major version numbers are going to advance rather rapidly in the
future, there's no real value in separate files for each compiler
version.

Deduplicate some of the macros #defined in each file too.

Neaten comments using normal kernel commenting style.

Signed-off-by: Joe Perches <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Anton Blanchard <[email protected]>
Cc: Alan Modra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions