aspeed: Introduce helper for 32-bit hosts limitation

On 32-bit hosts, RAM has a 2047 MB limit. Use a macro to define the
default ram size of machines (AST2600 SoC) that can have 2 GB.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
1 file changed