soc: nxp: fix typo in SoC name

Follow-up: #68778

There is a typo in nxp/kinetics/soc.yml.
The SoC `mk82f215` was added, however the correct SoC is `mk80f25615`,
which this commit corrects.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>