[PATCH] mx8m: csf.sh: use vars for keys to avoid file edits when signing

[Fabio Estevam]

Hi Tim,

On Mon, Jun 12, 2023 at 7:21 PM Tim Harvey <tharvey at gateworks.com> wrote:
>
> The csf_spl.txt and csf_fit.txt templates contain file paths which must
> be edited for the location of your NXP CST generated key files.
>
> Streamline the process of signing an image by assigning unique var names
> to these which can be expended from env variables in the csf.sh script.
>
> The following vars are used:
>  SKK_TABLE - full path to SRK_1_2_3_4_table.bin

Typo: SKK_TABLE --> SRK_TABLE

Reviewed-by: Fabio Estevam <festevam at denx.de>