CONFIG_PS3GELIC_UDBG is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

PS3 udbg output via UDP broadcasts on Ethernet

modulename: gelic_udbg.ko

configname: CONFIG_PS3GELIC_UDBG

Linux Kernel Configuration
└─>PS3 Platform Options
└─>PS3 udbg output via UDP broadcasts on Ethernet
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Enables udbg early debugging output by sending broadcast UDP
via the Ethernet port (UDP port number 18194).

This driver uses a trivial implementation and is independent
from the main PS3 gelic network driver.

If in doubt, say N here.

source code: