CONFIG_BCM47XX_SSB is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
SSB Support for Broadcom BCM47XX
modulename: wgt634u.ko
configname: CONFIG_BCM47XX_SSB
Linux Kernel Configuration
└─>SSB Support for Broadcom BCM47XX
In linux kernel since version 3.1 (release Date: 2011-10-24)
Add support for old Broadcom BCM47xx boards with Sonics Silicon Backplane support.
This will generate an image with support for SSB and MIPS32 R1 instruction set.
This will generate an image with support for SSB and MIPS32 R1 instruction set.