[U-Boot] [PATCH 3/3 v2] Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value

[Alessandro Rubini]

> +	/* Round up to make sure size gives nice stack alignment */
> +	DEFINE(GENERATED_GBL_DATA_SIZE,
> +		(sizeof(struct global_data)+15) & ~15);
> +

This has already been applied, sooner than usual.  Isn't it cleaner to
force alignment on the structure itself? This way different architectures
may use different values, if the need arises.

This shows it.

    struct a {
        int i;
    } __attribute__((aligned(16)));

    struct b {
        int i;
    };

    int main()
    {
        printf("%i %i\n", sizeof(struct a), sizeof(struct b));
    }

It prints "16 4" as expected.

/alessandro