CONFIG_PS3_STORAGE is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

CONFIG_PS3_STORAGE (not configurable)

modulename: ps3stor_lib.ko

configname: CONFIG_PS3_STORAGE

Linux Kernel Configuration
└─>PS3 Platform Options
└─>PS3_STORAGE
In linux kernel since version 2.6.23 (release Date: 2007-10-09)  
source code:
drivers/ps3/ps3stor_lib.c
depends
CONFIG_PPC_PS3