CONFIG_HW_SUPPORT_UNALIGNMENT_ACCESS is not available for thedefaultarchitecture x86.
Result is shown for architecture nds32

Kernel support unaligned access handling by hw

configname: CONFIG_HW_SUPPORT_UNALIGNMENT_ACCESS

Linux Kernel Configuration
└─>Kernel support unaligned access handling by hw
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Andes processors load/store world/half-word instructions can access
unaligned memory locations without generating the Data Alignment
Check exceptions. With an IP-only configuration it is safe to say N,
otherwise say Y.

depends
NOT CONFIG_ALIGNMENT_TRAP