CONFIG_PPC_16K_PAGES is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

16k page size

configname: CONFIG_PPC_16K_PAGES

Page size
└─>16k page size
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  

depends
CONFIG_44x or CONFIG_PPC_8xx