package/bluez5_utils: expose more disable options

package/bluez5_utils: expose more disable options

BlueZ builds a lot of Classic BT profiles by default but allows
to disable them. This is especially handy when only BLE is needed
and enabled in the kernel.

Otherwise this yields warnings like this on bootup:

 profiles/network/bnep.c:bnep_init() kernel lacks bnep-protocol support
 src/plugin.c:plugin_init() System does not support network plugin

Also it allows to disable btmon which should not be needed on
production systems and is ~800KB in size.

Expose those options but default to 'y' to no break existing
configurations.

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>