Bluetooth: ISO: Add Kconfig for ISO central/peripheral

Add two new Kconfigs: BT_ISO_CENTRAL and BT_ISO_PERIPHERAL
that is used to do central or peripheral only builds,
similar to the BT_CENTRAL or BT_PERIPHERAL Kconfigs.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
10 files changed