CONFIG_BAMBOO is not available for the selected architecture x86.
Result is shown for architecture ppc

Bamboo

modulename: bamboo.ko

and/or

pci_auto.ko

configname: CONFIG_BAMBOO

Machine Type
└─>Bamboo
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
This option enables support for the IBM PPC440EP evaluation board.
source code:
arch/ppc/platforms/4xx/bamboo.c

is selected by
CONFIG_440EP