Bluetooth: BAP: Apply missing guards for Kconfig values

Some pieces of code were missing proper guards for Kconfig
values, which could cause compile issues

The massive amount of #if in bap.c clearly indicates that the
file should be split, as it contains many things that are specific
for various roles.

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