Build: Enhance toolchain version check

Move toolchain version checks from check_config.cmake to dedicated
toolchain_XXX.cmake. Those checks are created specially for toolchain
limitations. They shall not be placed in TF-M functionality
configuration checks.

Make the valid version range more clear in toolchain_XXX.cmake.

Change-Id: I79fc1a7ae18dce6ffc98408c16ed7e3863bf0b9d
Signed-off-by: David Hu <david.hu@arm.com>
3 files changed