[RFC][PATCH] spl: Turn spl_board_init() into weak symbol

[Simon Glass]

On Mon, 19 Sept 2022 at 21:52, Marek Vasut <marex at denx.de> wrote:
>
> Make spl_board_init() a weak symbol and get rid of Kconfig symbols
> and ifdeffery guarding this function. Since the spl_board_init() is
> now a weak symbol, boards can either use the default implementation
> which is empty and gets inlined with zero text increase, or override
> the implementation with their own as needed.
>
> Signed-off-by: Marek Vasut <marex at denx.de>
> ---
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Tom Rini <trini at konsulko.com>
> ---

Reviewed-by: Simon Glass <sjg at chromium.org>

but please add a nice comment to spl_board_init() indicating what it
is for and when it is called.