[U-Boot] [PATCH] dtoc: make generated platdata structs const

[Philipp Tomsich]

> On 07.01.2019, at 20:29, Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com> wrote:
> 
> The platdata initialization structs are currently generated into .rwdata.
> Make sure the are put into .rodata by generating them as const.
> 
> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>