amd/*/gcccar.inc: Replace local declarations
Although useful to declare local symbols inside macros clang does not
support them. Using the \@ symbol which increments each time the macro
is used we can do the same. With BUILD_TIMELESS=1 the binaries don't
change and do build with GCC so nothing is lost here.
Change-Id: I01054e2bdcb63810b21eb51b46bdc6e1bd999516
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63045
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>