CONFIG_CAVIUM_OCTEON_HW_FIX_UNALIGNED is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_CAVIUM_OCTEON_HW_FIX_UNALIGNED.
Result is shown for kernelversion 6.2.5

Enable hardware fixups of unaligned loads and stores

configname: CONFIG_CAVIUM_OCTEON_HW_FIX_UNALIGNED

Linux Kernel Configuration
└─>Enable hardware fixups of unaligned loads and stores
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Configure the Octeon hardware to automatically fix unaligned loads
and stores. Normally unaligned accesses are fixed using a kernel
exception handler. This option enables the hardware automatic fixups,
which requires only an extra 3 cycles. Disable this option if you
are running code that relies on address exceptions on unaligned
accesses.