CONFIG_FSL_85XX_CACHE_SRAM is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

CONFIG_FSL_85XX_CACHE_SRAM (not configurable)

modulename: fsl_85xx_l2ctlr.ko

configname: CONFIG_FSL_85XX_CACHE_SRAM

Linux Kernel Configuration
└─>Freescale Book-E Machine Type
└─>FSL_85XX_CACHE_SRAM
In linux kernel since version 3.1 (release Date: 2011-10-24)  
When selected, this option enables cache-sram support
for memory allocation on P1/P2 QorIQ platforms.
cache-sram-size and cache-sram-offset kernel boot
parameters should be passed when this option is enabled.

source code: