cpu/cc26xx_cc13xx: add custom ld script
cpu/cc26xx_cc13xx: add custom ld script

This add a custom ldscript for cc26xx_cc13xx CPUs,
which allows linking CCFG configuration, usage of GPRAM,
etc.

Signed-off-by: Jean Pierre Dudey <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@jeandudey.tech>

jasonatran/RIOT,kYc0o/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,jasonatran/RIOT,OlegHahm/RIOT,jasonatran/RIOT,ant9000/RIOT,authmillenon/RIOT,OlegHahm/RIOT,kYc0o/RIOT,kaspar030/RIOT,miri64/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,miri64/RIOT,ant9000/RIOT,miri64/RIOT,kYc0o/RIOT,kYc0o/RIOT,authmillenon/RIOT,OlegHahm/RIOT,ant9000/RIOT,OTAkeys/RIOT,miri64/RIOT,ant9000/RIOT,ant9000/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,OlegHahm/RIOT,kaspar030/RIOT,jasonatran/RIOT,authmillenon/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,kaspar030/RIOT,miri64/RIOT,authmillenon/RIOT,kaspar030/RIOT,authmillenon/RIOT