[PATCH] configs: am43xx: Migrate to CONFIG_SYS_MEM_TOP_HIDE from CFG_PRAM

[Tom Rini]

On Tue, Dec 09, 2025 at 11:20:43AM +0530, Beleswar Padhi wrote:

> The TI AM43xx HS boards have been using CFG_PRAM to hide the top 64MB
> firewalled DRAM memory from U-Boot. However, CFG_PRAM only prevents
> U-Boot from relocating into that memory, but it is still open for access
> for any other usage.
> 
> Therefore, migrate into using CONFIG_SYS_MEM_TOP_HIDE which reduces the
> ram size itself ensuring that memory is not visible to U-Boot at all
> (either for reloc, or general usage).
> 
> Signed-off-by: Beleswar Padhi <b-padhi at ti.com>

So, since it sounds like we're failing to boot now and this fixes, it,
it's fine for the release. But what's using the memory under CFG_PRAM,
if we aren't relocating ourselves? I want to better understand the
failure case here, thanks!

-- 
Tom
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