[coreboot] IS_ENABLED() vs CONFIG()

Dear all,

Now, when we run "coreboot$ ./util/lint/kconfig_lint " , we can see :

#!!!!! Warning: CONFIG() used on unknown value (option) at src/include/kconfig.h:21.
#!!!!! Warning: CONFIG() used on unknown value (%02x) at src/northbridge/amd/amdfam10/util.c:138.

B. Regards,

Elyes