Now that we can specify that the default values for the CPE_ID variables
are valid, without having to actually set one (or more) to their
default, add a check-package check that validates that the CPE_ID
variables are indeed not set to their default.
It also validates that CPE_ID_VALID is not set when another CPE_ID
variable is set to a non-default value.
Add an anchor in the manual so that we can easily point to it.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Cc: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
