IIOD: Support printing device label in debug output
IIOD: Support printing device label in debug output

Print the label, or name, or ID as the IIO device identifier, instead of
printing just the name or ID.

Signed-off-by: Paul Cercueil <a027184a55211cd23e3f3094f1fdc728df5e0500@crapouillou.net>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio